So I have had my Red 8 pound Medicine Ball for a week or so and love it. I have been swamped and busy busy trying to deal with the beloved blister as well as get my miles in so I haven't used it much. It sits looking at me inviting me to come play! I do like having some extra weight resistance when doing my abs and it feels like a little goes a long way. Below is the review I submitted but I have to put in a disclaimer. I am not a gym rat...more like a road rat! Sorry there were limited boxes to check. CSN has great stuff, be sure to check out their stuff, there is a lot of it!