Coming from the Band 4, the differences are huge. Much better screen, measurements, and GPS accuracy. The only drawback remains that, as with every model, the strap never lasts more than a year. Buy fabric ones from Temu for 2 euros.

The first one I had gave incredibly good readings. I lost it and bought the same one again because I was very satisfied. Now the new one I have does not give accurate readings, it lags during exercise and shows me only low heart rates even when mine is very high, it doesn't have good response time... In general, the second one was problematic and I was disappointed.

Having worked with Mi Band 3 and 4, I moved to the 9. Amazing battery life, very good screen, only the watch faces don't excite me but that's subjective. It's worth its money. It has some glitches when connecting with iPhone, but it's nothing important, not a dealbreaker.

it is a good little watch, comfortable and the battery easily lasts a week with the screen on. it is the second 9-series that Germanos replaced for me. both the first and the second, after about two and a half months, did this to the screen several times a day, which became annoying. I bought it for 40 euros and when it broke I gave it to the Germanos service and in 15 days they gave me a new one. and with the second one, the same thing happened again, but I told them I wanted my money back or to give me the 10-series. and in the end I got the 10-series. I probably got a problematic batch.

I got it for my mother and she has really enjoyed and appreciated it! She doesn't take it off her hand and it only needs charging once a month.

The battery lasts less compared to previous models.
In the sea, it does not record swimming data...
After 2 months, the sensor broke and it does not record any sports activity, heart rate, sleep, etc....!!!!!!!!!!
Now, I use it only for time and steps.
):

It is indeed waterproof, but the measurements in the pool are... completely off. Out of the water, it does quite well in calculating distances.

It is very nice aesthetically and quite functional with all the recordings it provides. I didn't like that it only includes active calories, without including BMR calories.

The best 30 euros you can spend. With the usage I do, the battery lasts me 10 days with notifications for vibrate, SMS, calls, and Instagram (of course, I turned off the phone's Bluetooth because I didn't need to see the notifications from the watch during the day; I use it for my work). For jobs like construction, for example, it's not suitable because the bezel of the watch gets scratched easily. I found a scratch on a wall in a hotel where I was working and it got scratched.

With every charge, it disconnects from the phone and does not send call and message notifications. After many attempts, I gave up and now it only counts steps and sends notifications that I have entered in the calendar. It does not have many pairing capabilities with fitness tracking apps. However, if you search for it on ChatGPT, you can find solutions.

I didn't like anything about this watch. I don't know if the device was defective... The previous models had a simpler design but were also more reliable.

I have had it for 3 days, it looks nicer compared to the 5 or 6 I had, but not all of its functions work. For example, the sleep function, heart rate measurement, and oxygen measurement (in the sleep function it shows that I sleep 2-3 hours) (in the other two it doesn't even show a measurement, just displays the message 'tighten the strap more'). Anyway, maybe it's still early and I haven't learned how to use it properly. If you have any tips, I would be happy to hear them

Unacceptable, I have it for two days and the pedometer has been stuck from the very first moment, I bought it from the mi store and I'm trying to sort it out but they keep sending me from one person to another, I've made 30 calls to 30 different Xiaomi services and it's like playing a guessing game. Money wasted, just like everything Xiaomi I've ever had in my life.

I was an owner of the mi band 5 and I have to say the band 9 is truly perfect in every aspect, especially the screen. The only negatives are the strap included in the package—I don't like this type—and the battery, which with my usage lasts about 10-12 days. It's not bad, but I would like a bit more.

Super cute smart watch !! I love it !!!

Very good. Accurate measurements. I have had the watch for 4 months already. The battery lasts about 2 weeks. I don’t put it in the sea even though it says 5 atm. Only raindrops and everything is fine.

Value for Money this watch. I got it for work but I also wear it at the gym!! Amazing!

The best choice for someone who wants it as an activity tracker! I personally have a Casio G-Shock, but at the gym I use the Xiaomi Band 10

Classic band, does what it says. I got it for my daughter. She wears it all the time, she was excited about the color.

Exactly what I expected. Nice color and appearance. Many functions. Reasonable price. I am absolutely satisfied.

Excellent gadget, I use it during my workouts. It goes easily in the sea, has excellent battery life and is very cheap. The only drawback is that the strap causes irritation after prolonged use.

I bought it as a gift for my father and he has loved it. It works perfectly, the battery lasts almost a month, its size is very convenient.

owner of the 5, level better, 5 out of 10 lights up when raising the wrist, disconnects at regular intervals resulting in not seeing calls and notifications, excellent screen, very durable strap, perfect battery. Unfortunately, it is not worth it for me who wants the simple things, as I mainly have it for calls and notifications

Beautiful watch with a large battery.. measurements are quite good and connectivity as well but it comes off very easily in the pool and I have almost lost it many times and also it cannot be pressed in water.. be careful.. price is great for what it offers..

a good little watch for someone who wants to see some measurements without particular requirements. it sits moderately on the hand, that's why 4 stars.

The function that activates the screen when you turn your wrist works about 7 out of 10 times if you don't wear it too tight. Also, if the sun hits it — e.g. when you wear it on your left hand and wait for someone in the car for 5-10 minutes — the screen turns off and doesn't turn back on, except when you put it to charge.
The screen is very bright and its battery is very good and had extremely good measurements.
It's worth it

It is better than the smart band 4 I had before (I changed it because its battery gave up). Its battery is a BEAST, with the always-on display function enabled and with 24-hour heart rate monitoring, blood oxygen, and sleep tracking, it lasts me 6-7 days. It stands out for its elegant design, its large and bright AMOLED screen that offers comfortable reading even under sunlight.

Very good in its measurements and the battery lasts several days (about a week), even with all 24-hour measurements active.

Nice bright screen!

However, the software (mi fitness) is not particularly good, and unfortunately it cannot connect to MyFitnessPal, which might interest some people like me.

Also, the function that activates the screen when you turn your wrist works about 6 out of 10 times, which is annoying. It is a software problem that existed in previous models as well and it seems it has not been fixed yet.

Very satisfied, clearly more accurate measurements, more readable screen, perfect color, generally comfortable for daily use! It is more than worth its money in this category! I highly recommend it to anyone looking for something affordable and relatively small in size for everyday use.

Amazing watch I have to say, I've had it for a few months and it has helped me a lot and it also has excellent battery life that can last more than 21 days as stated in the watch's description. However, if you want to use this watch for a sport like basketball, you will need a better strap with a regular safety clasp to protect it more from sudden movements and more.

But overall 10/10!!!