oldfella, they're talking about the elevated creatinine levels which is all just bullshit. This stuff has been studied TO DEATH!!! Not only is it harmless, it is definitely bemeficial in increasing you performance. Is it a wonder supplement? In that respect, yeah, it sort of is. As long as you remember to stay properly hydrated (which you should be doing anyway), it is harmless. The only problems are secondary to existing conditions like if you have high blood pressure, it may increase you blood pressure. Or if you are prone to stomach and intestinal upset, than it can cause some bloating and the shits. The above dosing schedule may be fine but it only applies to creatine monohydrate or CM. There are other forms that may be better and require less or no loading.
creatine ethyl ester
creatine monohydrate (USP, micronized, effervescent, etc.)
kre-alkalyn (what I use)
creatine gluconate
creatine maleate
potassium creatine
calcium creatine
sodium creatine
creatine phosphate
cyclocreatine
creatine phosphorenolpyruvate
creatine succinate
creatine formate
creatine citrate
creatine fumarate
creatine tartrate
creatine ascorbate
This is probably just going to make everything more confusing but the point is, is that it's safe, it works, and it's cheap.