The watch has been in my possession for about 3 weeks. After searching the entire internet for reviews with mixed comments, I decided to try my luck. First time with Polar after many Garmins, with the latest being the Fenix 5 Plus.
Visually, the watch is not in the same class as Garmin's high-end series, it is more plastic but visually appealing and compact in size. The strap is very comfortable and the weight of the watch, combined with its thickness, makes you forget that you are wearing it.
The mobile and computer application, compared to Garmin's, is a bit more complex and difficult to use, as I often struggle to find what I am looking for.
The screen is a slight downside as it is not particularly bright and does not allow for black letters on a white background during workouts, but it does not pose a problem.
It has notifications from the phone in Greek, unlike Suunto which still does not support Greek.
In terms of menus and customization, it only offers the essentials, whereas Garmin is far ahead as you can customize everything for anything.
The battery seems to last quite long, even during GPS workouts, with a loss of about 4-5% in a one-hour training session.
The sleep tracking function is great, providing detailed information about the different sleep stages and interruptions, as well as heart rate monitoring.
Now, regarding the sports aspect, I believe that Polar has focused on this area, making compromises on the details. I wear the watch relatively tightly on my wrist, about a finger above the bone, and I also use the strap connected to a Polar application called Beat for comparison. After a 10km run, the difference in average and maximum heart rate was only one beat. In a second test, the averages were the same, with only one beat difference in the maximum. I think I don't need to say anything else. The only thing I notice, which is expected, is that in intermittent exercise, the watch takes a bit longer to register heart rate compared to the strap during the relaxation phase.
You have the ability to create an intermittent workout, but I think it is better to do it through the computer application, as the mobile app only offers basic functionality.
As for GPS, it quickly acquires the signal within 6-7 seconds, at most 15, and does not lose it during the workout. Compared to the Fenix 5 Plus, when running continuously in the neighborhood, the distances are almost the same with a deviation of a few meters at worst, but the route maps on Polar are clearly more accurate in both straight lines and turns. Even in the national park where GPS signals do not work at their best due to vegetation, it measured around 1900 meters on a measured 2km route, with the route on the map being correct without any strange deviations.
Overall, I don't know if I would call it value for money, especially since it is quite expensive in Greece, but at least in terms of sports, it seems to meet the needs of the athlete correctly. Soon, I will also test it against the Fenix 6 Pro to check the accuracy of both devices.
In the future, I will write about the other features such as the recovery pro, which analyzes your training parameters and informs you about the state of your body, and the night recharge, which shows how charged your batteries are based on your sleep, in order to start a workout.

Excellent sports watch, with great accuracy in measurements, at least as far as running and walking that I have used it for. Countless functions, extremely durable and with an incredible battery, easily lasts 1 week with daily exercise of at least one hour.