I think it's the tiny screws on the back... this watch constantly pulls every hair on my wrist. I have to adjust and twist it a lot to get it to stop pulling... But then it starts all over.
As a watch maker, going forward, please assume that people might have hair on their arms!!! I would really love it if the screws were counter sunk, or more of a style that didn't allow for arm hair to get caught and pulled constantly...
I've had the Casio G-Squad watch for a few days, and I'm loving it! It's a perfect blend of style and durability. The LED backlight comes in handy, and the step count feature is keeping me on my fitness game. Overall, it's a fantastic watch that I'm really happy with.