I've only owned this for a week or so, but everything works fine thus far. Obviously, durability assessment will require months or years. With the help of YouTube videos, adjusting the size of the watch wristband was easy and didn't require tools beyond what I already possessed. The solar recharge feature works fine so far. When the watch arrived I set it up in the winter sunshine coming through a west window and that seemed to kick-start the movement. (The second-hand increments in two-second jumps if the watch is low on battery, and one-second jumps if it has an adequate operating charge -- according to the user manual.)