We bought a set of these medicine balls for our home gym and they are great. I have used them for ab workouts, and they can be used for plyometric exercises like chest passes. The material seems high quality, and is holding up well after six months of use. Since only my wife and I use them I cannot comment on how they will hold up in a gym setting, but they are working perfectly for us right now.
Rating: [5 of 5 Stars!]