I used to have two ROO Chronos, which is a watch I love, but a bit too large for my wrist.
The first was a Rubberclad. One day I noticed that the rotor was turning in "free mode", not really winding the mainspring.
The second was the Panda. One day it simply stopped running, no way to restart it.
Both issues where fixed by AP under warranty, but I ended up selling the watches. Nothing to do with the issues.