Positives
1. The battery lasts exactly 24 hours after 1.5 years of use.
2. Beautiful.
3. Quality microphone that withstands the test of time as long as you don't expose it to showers/seawater.
Unfortunately, this is where the positives end.

Negatives
1. Extremely expensive; I bought it for 350 euros used, and I believe that is way too much for what it offers. 250 would be a reasonable price! Imagine that 2 of these watches are equivalent to an iPhone 16, which is a regular phone that you can use for calls, photos, etc. Apple has gone overboard with the price here. I deduct 1 star purely for this.
2. Very few watch faces and shockingly limited customization options with fonts, numbers, etc. On one watch face, you have a choice of 2 or 3 fonts. In contrast, Samsung/Huawei offers countless free options to tailor it to your tastes.
3. The Watch App messages do not come through, and to see and respond to them, you have to pay for a third-party app.
4. The strap that comes with it can unclip when you take off a jacket, and you might find the watch on the floor if you feel it slip off. Therefore, you are forced to spend an additional 15 euros on a strap for a 450 euro watch.
5. The screen is excessively small for the average male wrist. Even the 44mm version is borderline small in my opinion. It should have been 45mm or larger; what a shame.

In conclusion, it is not worth it

I have never been disappointed by an Apple product, not even with this one. It is very useful and I use it constantly. I have tried several cheap Android smartwatches that I now consider useless, as I switched to the expensive side with the Series 7 and saw its true capabilities! Apps, messages, calls!! I can even scroll through Instagram from the watch!

It performs everything instantly and never lags, I haven't encountered any bugs either. Although the Series 9 will be released soon, I believe that the Series 7 holds up very well and is the last watch that truly deserves its price and offers, as it is the same as the Series 8 but with the largest screen that can fit a keyboard (which doesn't support Greek, it immediately goes to voice command). It will receive updates for at least 4 more years!

It is a very useful tool for health measurements, fitness, sleep, etc. And I can say that everything works so smoothly and automatically sometimes that I simply trust it and it actually works! Of course, I should add that sometimes when I sit still for a while, it thinks I'm standing or walking and tells me "Well done."

It scratches easily, especially on the corners of the curved glass, and I have bumped it several times, thinking I could pass through easily. And in general, I'm afraid of its durability because if something breaks, it's gone...

The battery is a huge downside as it only lasts for 1 day. From the morning when you wake up until the evening when you return home and have to charge it again. I have never run out of battery, but sometimes I have that fear. On one hand, it has many functions and I often play with it, so it's logical, but still. It has fast charging and somewhat balances things out.

Generally, I don't like wearing things on my wrist, but sometimes I forget that I'm wearing it as it doesn't bother me much! One downside is that not all the types of straps that Apple sells are available in Greece (which shows how third world we are), and the more comfortable ones are only found from third-party sellers, which I see reviews saying they break quickly...

I have had it for 1 month in product(RED). It is good, it is quite accurate in measuring heart rate, oxygen saturation (I have no opinion on ECG, I need to compare it to a machine that a doctor has...). Clear, bright, and beautiful screen, with a 45mm dial. Of course, it is relatively easy to scratch. It has a microphone and speaker for calls and notifications, convenient when doing activities and you cannot, for example, take your phone out of your pocket, and responding to messages with voice dictation. In terms of battery, it is so-so for me because I was used to charging another watch every 2 weeks, while now it lasts for 2 days (depending on usage, of course). I would like it to last at least 6 days. The strap is okay, but if the hand sweats, it can irritate and cause redness and pain in that area. One of my favorite features is that it has Apple Pay and allows you to make payments with the watch without taking out your phone. It has a wide variety of watch faces, many of which are customizable. And of course, seamless integration with iPhone. I am satisfied (and still am) with the watch, and I would recommend it to others (if they also had an iPhone).

After the SE as the first of the company, I went to the flagship because I loved the watch. I have had it for about 5 months. First of all, from the unboxing experience, you understand that you are dealing with a premium product when the packaging is so well-crafted. Design-wise, it is sturdy and of high quality, it has taken a few hits and it holds up well. The strap is very good, I have also bought another one and it doesn't feel heavy visually. I like how easy it is to put on and take off the strap, which is a bit of a science with other brands (I'm talking about Huawei). The screen is excellent. Top-notch. The colors and especially the brightness, you can see everything even when the sun is shining directly on the watch. It responds exceptionally well, no issues with speed no matter what I have asked of it. Endless applications, the software, as we know, is light and very smooth. The measurements, although I'm not an expert, I believe are very close to reality. I finally love the sleep tracking stages. Heart rate, oxygen, calories, steps, and many more, everything is great. I love the integration with the iPhone and I like that the company pays attention to its ecosystem. All notifications come to the watch, and I can control them from there, reply to messages and calls. It's very convenient when driving to have the driving mode and always have the screen active. Finally, the battery, with all the functions on and if you use it throughout the day, 2 days strictly, no more. We know it and accept it. If we want something better and we have the budget, we go for the ULTRA. However, we have noticed an improvement in charging from the SE, now it reaches 90% in about an hour, ready to use, very good in this area. Conclusion: It's worth getting it without a doubt, and even better if it's pre-owned in good condition. It has nothing to envy from the 8. The ULTRA is in a different category and is the King. But yes, I definitely recommend the 7 with its smaller bezels compared to the 6.

I am new to the smartwatch industry as I have not owned any models until now (neither Android nor Apple), so my review only covers this specific device. The positive aspects are:
1) Build quality. Excellent. Although the case is made of aluminum and not steel, it does not mean it lacks durability. After all, the majority of consumers will not use it for extreme activities such as climbing or hiking.
2) Functionality. If you have an iPhone, it is definitely worth investing in this watch as it is an extension of your phone in terms of various functions it offers (contactless payments, updates, notifications, etc.). The connection to the phone is effortless and seamless without any disconnections (even up to 10 meters away), and most of the time, you don't even need to open your phone to complete certain actions, such as answering calls, messages, emails, etc. Additionally, the heart rate monitoring functions are quite accurate and provide a good picture of your health status, although one should not solely rely on them to draw safe conclusions about their health.
3) User-friendliness. The menu and operation of the watch are within the framework of iOS, so Apple device users will find it quite familiar, while those coming from other operating systems will have no difficulty getting used to it.

The negative aspects are:
1) Price. Comparatively high compared to the competition.
2) Battery. The battery life could be considered, at best, average, as with normal usage (answering a few calls, checking notifications, responding to messages), it lasts almost 2 days. There is an option to activate the Always on Display feature, which, however, consumes a significant amount of battery and naturally reduces the watch's autonomy drastically.

Unacceptable in relation to the reputation it carries and the acquisition cost. I am the owner of the iPhone 11 and previous experience with what they call a smart watch, I acquired the Huawei GT 2 Pro in June 22 when I decided to buy one. An excellent watch, easy to connect with the iPhone, durable, beautiful, and with great autonomy. However, I decided to sell it because I was interested in the reliability of the Apple Watch's biometric measurements, specifically the electrocardiogram, heart rate, etc. Big mistake... I regret the money I spent. Specifically:
Durability: You spend 450 euros and the first thing you look for is to put a protective glass in case you scratch it (it doesn't have sapphire crystal like other much cheaper ones).
Accuracy in measurements: Laughable. From the bed in the morning to the bathroom, 98 steps (I live in a three-room apartment, not in a palace), ridiculous.
Electrocardiogram: Literally laughable.
Heart rate: Approximate.
Durability: I mentioned it above. Protective glass and make the sign of the cross. Apple does not use sapphire and titanium for the case like other much cheaper watches.
Connectivity: The only positive, but on the other hand, I had no problem with the humble Huawei.
I don't know what else to say except that I finally fell for it. The only thing left is that I wear an Apple Watch... to "show off" and that's it.
I hope that with the above, I was able to help others not make the same mistake as me... because objectively, it is a mistake because there are many other smartwatches, much more beautiful, durable, with the same or even better capabilities, and most importantly... much cheaper.

I have had an iPhone for 10 years and I have never been in the process of buying the watch.
Well, for those of you who have an iPhone, it is a must-buy.
If you are one of those who change iPhones every year, keep the same phone for a year and invest in the watch!
The experience of using the phone-watch and their interaction is such that you will wonder what you have been missing all these years.

I have had it for a week and I am completely satisfied with everything EXCEPT for the battery, which is a particular issue.
By buying it, you add an additional "problem" to your life, which is the almost daily charging, as you use the watch as it should be used with everything open, including during exercise.
You can have a battery life of two days IF you have the always-on feature turned off and generally do not use it much during the day.

As I mentioned before, the collaboration with the iPhone is excellent, their interaction is immediate, and it is impressive that you can respond to messages by dictating without missing a word, even in Greek!
It is annoying that the Viber application, which many people in Greece use, is not available.

The quality is very good, the screen is clear under all lighting conditions, and it is slightly larger than previous models from the iPhone 4 onwards.

Beyond that, there are the measurements that we all know and may prove useful.

A positive aspect is that it has fast charging, but it is annoying that you can only charge it exclusively with the fast charger, as there is no reason to burden the battery with additional heat when you do not immediately need battery life.

I hope I helped.

P.S. From the first moment, it has the special Spigen membrane. It is a bit expensive, but it fits perfectly and looks as if it is not wearing anything. Pay attention to the placement! In the photos I provide, it is with the membrane placed and with the screen on, always on and closed.

Edit: The Spigen membrane, although quite expensive, affects the accuracy and immediacy of touch. I did not know how immediate and accurate the touch on the Apple Watch was, so as soon as I unboxed it, I placed it on top. However, as soon as I tried using it without the membrane, I realized that something was missing. It is not a big problem as there is the Digital Crown that helps with navigation, but I have to mention it