I bought a few of these on January 17th ($5 each, got different colors). The only working watch I had prior to these was a gift, and while it's great and has a lot of functions, it's also a bit bulky for my small wrists, and I don't really need all the buttons, so I don't wear it often.
These watches were still a bit bulky (probably about the same size as the other watch, really) - but they're much lighter. And once I got them over my hand (they stretch well), they were a bit loose and slid up my arm (like most watches do). My wrist is about 5 1/2" around, I think. Overall I'm pleased, though.
A warning about the instructions - I'm pretty sure they got the buttons backwards in the time-setting instructions. I haven't looked at any other button-related tasks yet.