Bought one of these to use at the office when my adjustable desk is in “standing” mode. It lasted about 6 weeks before developing a crack along one edge in the center. I weigh about 190 lbs, so I question the claims that this thing supports up to 400 lbs in long-term regular use. On the bright side I was able to get a refund.
https://www.amazon.com/Simply-Fit-Board-Workout-Balance/dp/B01M10NRRM

