I am type 1 diabetic. Unfortunately, it is not reliable. The measurements it gives often have a huge deviation from those you do with finger pricking. I have experienced up to 90 units difference. So be careful users. When it shows you 40 or 50 sugar and you don't have dizziness or other symptoms of hypoglycemia, (diabetics know the symptoms) it is good to also do finger measurements. The difference it shows you will be the same until the sensor expires. Instead of removing it, you can continue to measure and add the difference. That's what I do. If the company gives you a replacement message, they will change it. For type 1 diabetics, it is fortunately free, with a prescription, and it is a relative help even though it is unreliable because it is not pleasant to constantly prick your finger when you inject in the morning, noon, and night. You simply calculate the difference when it starts showing you very low measurements. I do not recommend buying it at all, it is not worth the money. As for putting it in the sea, forget it! Here it often breaks before it expires. Avoid too much water.

Whatever we say is not enough. Firstly, its measurements are extremely accurate, verified both with a simple finger meter and with laboratory results. I hesitated to buy it because I believed that the needle would bother me by constantly being on my skin, that it would not stick well, etc., until my doctor put it on me (with the lancet). You don't understand ANYTHING, both in the application and afterwards. Absolutely nothing, it's not even a pinch like that of regular meters. It stuck perfectly to my skin, it didn't come off even during sleep, or even when my shirt got stuck or hit somewhere several times, in the end I had difficulty even removing it. For those with oily skin, the solution is pads from the pharmacy, which should be used in the shower anyway. The convenience it offers in measurement is unimaginable and the application on the mobile is very good, with many features and graphs. It is inconceivable for a diabetic not to have it. Let's hope that soon it will be prescribed and covered by insurance funds.

For someone who has been diabetic for years and the disease has progressed, causing problems such as kidney failure, heart problems, neurological issues, but most importantly, sugar control problems, so continuous measurement is required by finger pricking, the sensor is a lifesaver. You apply it for 15 days, all you have to do is scan it (either with the application you download on your mobile phone or with the meter you buy from the company that makes the sensor) and take your measurements as many times a day as you want. This way, you can adjust your food, medication, and life with diabetes in general.
The needle of the sensor is very thin and relatively soft. It doesn't hurt, it doesn't bother, and in any case, it is the best solution for advanced diabetes (whether it is type 1 or type 2). The problem with type 2 is that it is not prescribed, so you have to pay for it out of pocket (you need 2 sensors per month and the prices range from 59-63 euros per sensor).
The application is very simple to use, and the instructions included in the package are more than enough, but there are also videos on YouTube that you can watch.
I will give you a piece of advice. If you decide to get the sensor, get tegaderm film from the pharmacy, which is primarily made to protect wounds from moisture, but if you stick it over the sensor (after making a small hole to leave the small "eye" of the sensor empty), it protects you from accidentally catching the sensor on sleeves and clothes when you put them on or take them off.
You can wear the sensor normally in your bath/shower, and you can also wear it in a pool or the sea for a maximum of half an hour.

Because I have read that some people have inaccurate measurements or faulty products, I would like to give you 2-3 tips so that your measurements are better and more accurate. First of all, when applying the sensor, make sure not to squeeze the muscle of your hand so that the very thin and relatively soft needle enters the skin without bending.
After application, and because putting on or taking off clothes or sleeping and turning left and right can cause the sensor to move more than it should and the needle to bend, I put a protective adhesive tegaderm sticker on top of it (7cm X 8.5cm) after making a hole in the middle for the eye of the sensor first, and this way, I am sure that the measurements will be perfect for all the days I wear it.
As for faulty products, they always replace them and send you an envelope to mail the faulty ones back to the company (at their expense).

LAST ADDITION TO MY COMMENTS:
Last summer (2023), we found that the accuracy was not as good as in other periods. Something that led us to the conclusion that perhaps the very high temperatures during transportation by couriers play a significant role in the smooth operation of the sensor... Only the company can confirm this, of course.

I have been using the trial for 10 days now. The measurements obviously differ from those with blood because it does not measure blood glucose levels but rather in the interstitial fluid (as they mention). Surely, if someone wants greater accuracy, this is not what will provide it. However, the fact that you can have approximate measurements of 5-30 units (in my case) throughout the day at any time is easily a great convenience for me. You can roughly see where you are at any given moment, even when you are sleeping, resulting in a concise picture of the treatment you are following. Personally, it is a good solution for me. Of course, one downside is that it is quite expensive and you only have 2 per month through a prescription, so if for some reason it detaches from your hand, you will have to pay for the one that is not a small cost at all. In any case, personally, I also use a conventional blood glucose meter, but much less than before. As for the flaws, I don't have an opinion because I use it a little, but I imagine it will be a problem if it happens to me. I will come back again after extensive use

MINUS:
# Many meters have come out faulty and this can be serious or not depending on the case (e.g. the night before I gave birth, both meters I had came out faulty and as soon as I put them on and the 60 minutes passed, my husband had to rush to find a pharmacy open at night to find me a sensor at double the price, of course). As already mentioned, at least they take them back and replace them, but it is a hassle and they leave you hanging until all this is resolved.
# The measurement may have a deviation of 0-60 compared to the conventional meter, at least in my case, and this will affect how many correction units you will make or how much you will eat, so it can worsen hypo- or hyperglycemia, respectively. Especially in high and low levels, a confirmation measurement with a conventional meter is useful.
# For uninsured pregnant women with gestational diabetes and type 2 diabetics, the cost is about €120/month, which is not small! Even for insured individuals, for some reason the prescription is handwritten and requires the physical presence of the patient in the doctor's office each time...

PROS:
# Except for the first time I needed it, the Abbott customer representatives were impeccable and helpful.
# It is feasible for others besides the patient to easily check their blood sugar, either with the libre meter or with a mobile phone compatible with the company's application (still difficult, as there were 4 devices at home, all incompatible, but now that I got the Motorola, it is compatible and the application is very convenient).
# With all the flaws the system has (which they don't even upgrade in Greece, where there are already 2-3 new and improved versions available abroad), from my experience, I can say that it brought my long-standing glycosylated hemoglobin from double digits to 6.4!!! Besides the pump, it is the best alternative we currently have in Greece and in combination with occasional blood measurements, it can greatly help in blood sugar management!

I am torn between 2 to 3 stars. Mediocre to good, that is... The downsides are that sometimes it deviates from the blood readings. Other times, what is scary is the arrows pointing up or down, and they are not timely. Most of the time it falls within range, but there have been times when it just makes your life more difficult. I will say that as many measurements as it has saved me from pricking my finger, it also creates anxiety for me. They should be more careful, especially when it comes to health matters, and not be careless. By the way, in the technical department of Abbott (whoever has called will know what I mean), it is handled by a condescending person who is simply incompetent. You tell them you have a 100-unit difference with the blood reading and they ask you for measurements. You tell them 200-300 and they respond that both numbers indicate hyperglycemia, so everything is fine. Then they ask you for some codes from your meter, they talk so much that you get bored, and no replacement is offered. Replacement is only done if you say that it has detached or if there is a difference of 200 units. Unacceptable, this spokesperson is a complete failure. In conclusion, there are several improvements needed, but with enough effort and patience, I would say that it is still a useful product even like this