From what I can gather, here's my facts so far:
Creatine works great to assist in increased muscle mass.
Creatine works synergistically with AAS (so use it on-cycle).
Creatine helps to hold mass during off-cycle (so use it off-cycle).
There's really no damage from prolonged use.
Any additional info would be great, as I don't consider myself an expert in the slightest.