So second day of using Fusion Force and I really like this product. I started my workout with a added intensity and a tingling sensation all over my body. I started my routine and in certain sets that I would normaly have a little problem I was able to power threw em had that extra little kick to get that extra rep. I do belive that this is a great product and reccommend to my fellow AM ers . By the way just so you know I have used Rpm Drive Igf2 and neovar also NO Xplode Cellmass and Superpump 250 and Sizeon so Im not a person who is easily stimulated by caffine