[DampRobot]

My main concern with using these would be their CoF. I really have a hard time believing that they can be just as grippy as roughtop tread, especially on carpet. It just seems like both the geometry (small squares compared to a velcro like arrangement) and the material (fairly "slidey" plastic versus "sticky" rubber) won't allow these wheels to live up to their name.

Also, I wonder if these would experience stress or fatigue failures. It seems like this thread disproves this problem, but I have heard of placation wheels (which seem to use a similar design) experiencing this type of failure.