Cellmass is a pretty good product, but it doesn't contain enough servings for how much it costs. It has a good amount of creatine, and a good amount of glutamine. Glutamine is key to rebuilding cell tissue. I noticed that i wasn't as sore the next day if I took it right after my workout, and I have seen a good amount of gains in my workout. Within the first week of use I noticed about a 3 pound gain in water weight, then later any other weight that I gained was muscle mass. Although I am a big fan of BSN I wouldn't recamend this product unless you could get it for really cheap. Otherwise I would suggest that you get some creatine mono and some glutamine. It will be much cheaper and give you alot more servings.