Agree, its one sup that actually works. Also the water retention is muscular, I believe - its not edema. I started taking creatine after about 1 year of working out and the results were immediately noticeable. I gained a little size, 5lb on the scale, and was about 10% stronger.
edit: Also don't get sucked in to buying some expensive concoction. Creatine Monohydrate is all you need and is cheap. Preload 20g / day (5g x 4 times a day) for a week then 5g a day forever.