There are various categories of users for such watches. Athletes, gadget lovers, business people, those who are afraid of having a heart attack and want to monitor their heart rate, those who have extra 100-500€ and want to look trendy, and so on. By reading the reviews, you can roughly understand to which category each person belongs and draw your own conclusions about how much you identify with them and if their criticism suits you.
Personally, I bought it (about 8 months ago) mainly for work. I am not a fan of watches in general, but I travel a lot abroad and I need: 1) to know the time at any moment without constantly taking out my phone, 2) notifications from 3 professional email accounts + MS Teams + Cisco Jabber (+ personal Gmail, SMS, Viber, etc.), 3) easy contactless payments (there is no cash abroad), 4) the ability to make calls and receive notifications when I leave my phone at the office and go out for a smoke, when I go for a walk, or when I go to the beach and don't want to carry a 500€ phone under the hot sun or risk losing it in the sand, or when I go out for a drink at night and simply have a phone with me in case of emergency (again, without carrying a phone or worrying about it being stolen, etc.).
For all the above uses, the watch is simply excellent. With an eSIM from Cosmote, I have my number and my gigabytes on the watch (it costs an extra 10€ per month). Activation was very easy, as long as you find the right employee, and I was lucky in that regard. From there on, the watch connects seamlessly via Bluetooth to the Xiaomi 12, and if Bluetooth doesn't work because, for example, I have gone down to the warehouse, it automatically switches the connection to Wi-Fi (if you are within range of the same Wi-Fi), and if it still can't find the phone, it activates LTE and connects normally via the internet, allowing me to make calls, send SMS, emails, notifications, etc. I must admit that I did not expect it to work so seamlessly and reliably.
Through the Samsung app on the phone, you can configure which apps you want to receive notifications from on the watch, and if it suits you, you can even reply to messages (Viber, SMS, or anything else). Personally, it doesn't suit me because the keyboard it provides is too small, although there have been times when I needed it and managed to use it successfully. It also has ready-made quick responses, and you can add your own.
The sound quality is incredible for a watch. I can hear and be heard clearly even when I was on a motorcycle on Panepistimiou Street. Of course, don't expect to have a deep conversation in a noisy bar, but you can connect a Bluetooth hands-free device to the watch as if it were a phone.
The GPS + Google Maps is very convenient, and I didn't expect it. You set the route on your phone, and it automatically opens Maps on the watch. You put your phone in your pocket and you're good to go. It's also convenient that I can turn on and off the smart lights in my house from the watch.
The battery life is not good, with GPS, NFC, Bluetooth, and Wi-Fi always on, constant heart rate monitoring, oxygen level measurement every hour, and a simple watch face, it lasts me 2+ days, but anyway, I take it off and place it on the nightstand to charge while I sleep. Obviously, I would prefer it to last 20 days, but it's not something that personally bothers me.
The strap it comes with didn't suit me, but you can easily find better and much cheaper ones.
The battery life of my phone now lasts an extra day because I don't need to constantly turn it on and off to check the time or any notifications. I see them on the watch, and if it's something important, then I pick up the phone.
From me excellent, if I missed it I would definitely get it again.