First of all, it is NOT a smartwatch, in the sense of being an extension of a smartphone. This particular wristwatch can be set to ring and/or vibrate for incoming calls, messages, and notifications from the mobile phone, as well as offer the ability to read them, but that's about it. And of course, as a watch intended for those who swim in the sea or dive (spearfishing), it does not have a microphone/speaker.

Furthermore, it is a wristwatch mainly aimed (if not exclusively) at those who are moderately to highly involved in sports and outdoor activities. Through the relevant application (Garmin Express), one can download countless apps and install about 10 of them (due to memory limitations) in addition to the ones already installed. Also, through the relevant smartwatch or pc application (Garmin Connect), one can monitor countless parameters of these apps.

Its battery, with normal use of the watch, with the smart heart rate measurement function activated (not continuous), with the pulse oximeter activated only during sleep, and with the temperature measurement constantly activated, lasts about 11 to 12 days. However, if GPS is activated, the duration is greatly reduced.

Its screen is monochrome and does not have high resolution, resulting in its graphics being marginally satisfactory.

Solar charging has positive results only if one is at the beach for 2 - 3 hours or driving with their hand exposed to the sun. Otherwise, no, you won't forget to charge it.

In conclusion, it is a smartwatch that is mainly aimed (as mentioned earlier) at those who are moderately to highly involved in sports and outdoor activities. If someone is more of a couch and TV person, it doesn't offer them (almost) anything at all. The 4 "stars" are for the level of resolution and clarity of the screen.

I am very satisfied as I did not want rich graphics on the watch to go for a more expensive option. For more advanced display functions, there is the application that offers many. It does OTA updates, the long battery life is valid, and the measurements are quite reliable.

Garmin Pay with an alpha card works fine (it requires unlocking once a day), but for some reason, I had to call alpha bank to unlink the card from other electronic wallets as it failed to pass it.

A note: Because some reviews talk about the gimmick of solar charging, I have had the watch for almost a year and solar charging is not just a gimmick. It maintains the battery just fine if you expose it to the sun as it says.

https://www.skroutz.gr/short_videos/31024/garmin-instict-2-solar?from=user_public_profiles

No matter how good it is as a watch in general, the gimmick of solar charging makes it lose 2 stars.
If you want solar charging, get a gshock. I won't say that I regretted buying it, but if I could turn back time, I would get the non-solar version and save 100 euros.

Take a deep breath and read the most comprehensive review of all instinct 2 (in English). The guy mentions EVERYTHING. He also compares the GPS and heart rate sensors on the same routes with Venu, fenix, epix, with other companies and with a heart rate strap. You really won't need to read anything else, especially if you are also an owner of instinct 1