I took creatine for a while; to answer your question it does work, adn works well. My experiance with it was not pleasant though. I used to take about 4g a day split into 2 does: after the gym and before i when to sleep. I did not notice anything special though, my bench kept going in terms of weight, at the time i remember going from about 180 to 225 in a matter of a week and a half which was great for me at the time. I stopped
taking creatine for 2 days, and tried to work out like i did before. I couldn't lift ****, i could barely bench what i did before i started creatine.
Creatine also gave me a lot of water gain, i got size off it and strength while i was on it, but once i stopped i lost the strength almost instantaniously and the size and volume soon after.
I don't think its a bad suppliment, i just don't think it is a viable one for the long term.