I've been wearing this watch for at least 4 months now. I bumped it into walls, rock, countertops, glass, doorhandles, and my cat chewed on it for a while when it was charging. There's not a scratch on the glass or on the frame. The finish on the watch is amazing and it looks great.
The timepiece inside the watch does not track time properly. After losing connection with my phone (by my phone losing power) it will deviate by up to an hour within two days. This instantly corrects itself when it connects to my phone again though and while it is connected it will always display the correct time.
Battery-life is great. Even if you get a lot of notifications and have vibrations on you'll last more than a couple of days.
Software could be better. Connection to my phone is flawless, but heartrate monitoring by default gets done only once every 5 minutes instead of continuous, and display of the data is wildly erratic. I have seen the sleep tracking minutes go up while I was watching it after waking up. Recent improvements to the app have given me confidence that these things (and other issues) will be fixed eventually.
Overall this is a great watch for the price. Even if you would not be using it's digital features you would be hard pressed getting a watch that is this solid, with sapphire glass, for under 200€.