This Product is very effective I've been in the army 4 years now doing tons of pushups haveing a square chest. I had thought that was as good as it was going to get. This product will break the platuae effect from doing the same exercise for extended periods of time. You can feel it working and the difference in muscle groups, it is using compared to regular pushups. When you start using this product its a little wierd because you have to push and twist away from the floor to use all the muscles at once. Once you do this a few times it should begin to feel natural then youll be able to do this with ease.
Then just wait because you soon will reap the rewards I have recommended this product to freinds and every one I know likes the little sucker. I even convinced my dad to buy one, I really like them because there small, easy to use and can be easily stored on top of a closet, locker, or under the bed. They use stainless steal bearings which makes it glid relatively smooth great product.