Up to now see no scratches on the glass, and I am so sometimes geschrabt on a house wall along.
The operating buttons work and are still easily accessible. I've seen other watches with fixed studs.
In short, I am thrilled by this clock and would buy again at any time
Too bad that it no longer exists! :-(
Why 4 stars? Because the lighting me unconvinced.
The small display can be read in the dark poorly to not at all.