The only scratch I have on it so far is from hitting the watch face against a brick column, but I don't even notice it anymore even looking for it.

Even as careful as I try to be with it I know I still hit it against things and it hasn't scratched up at all. Wheither that's due to the screen protector (not tempered glass, just a standard plastic protector you'd lay on a phone) or not I don't know, but it's held up pretty well. That includes biking and running outside.

I literally only take it off if I go for a swim or at night when I sleep (I don't like having something on my wrist while sleeping)