I heard about it, a buddy of mine was using it and yes he did gain somwhere between 10-15lb in 2 weeks. But don't forget it's all WATER WEIGHT. This is what pisses me off about creatine. Within the first week or two you notice tramendeous gains in size and you'r so happy and satisfied. But god forbid you go to the club and dance for several hours. In the morning when you look at yourself in the mirror, just measure in decibals how loud will you scream when you see it all gone... in one night.
im sure ive seen alot of people say on forums and things posted on the net that creatine is the next best thing to steriods and is even considerd by some as cheating But it cant be that good if you just lose it all and its water weight.
I would recommend buying a regular creatine monohydrate, or swole by syntrax . I never used swole because I respond very well to regular creatine but many people here said its amazing.
As for water weight, yes that's what it is. It expands your muscle cells and fills them up with water. How else do you think you would get that kind of weight in just a week or two?
But I never used it more than 5 weeks consistantly just because of this frustration that i had, so it might be better to wait for someone else to reply who's used it longer so he/she can tell you their experiences. I honestly never kept the gains from it, maybe a little.
But by all means try it because you've got nothing to lose, it's not that expensive.