I use creatine every day. I take in about 5g per day, and I have definitely seen positive effects. It seems to be one of the more “controversial” supplements out there. By that I mean, I hear people talk about it like it is steroids. Rest assured, it is not the devil.
Creatine Dosing and FAQ (Easy read that explains everything you need to know.)
All About Creatine at Precision Nutrition (A little more science.)
Biotest Creatine, Top Notch.