Creatine is a tried and true supplement. Creatine is used for the development of fast twitch muscle fibers, ie not for endurance muscles, but for bodybuilding . It is definitely good. Be careful to use the appropriate gram dosage. It's been argued whether you need to start low and work your dosage up or if you should just start at the high dose.
I have cycled creatine in the past, it
will dehydrate you, so, make sure that you drink plenty of water.
Slow Twitch vs Fast Twitch Muscle Fibers
Great Creatine Article