This is what I can say from my personal experience: creatine serum works for me. I have noticed increased muscle endurance, as well as faster recovery, and muscle gain (part water retention, part muscle). I've never taken the powder form of creatine, so I cannot compare in that respect. I have also read some of the bad things that are said towards the serum and creatine in general. Most being muscle tears or claims that creatine causes kidney and liver damage.

First, STRETCH, and learn how to stretch effectively. With increased exertion, your current stretching exercises may not be cutting it. Second, KNOW YOUR LIMITS. Pushing yourself too far is what leads to serious injury. Third, in some cases, due to differing body chemistries and such, creatine could have serious side effects. BUT, for the most part, it has been proven safe. If creatine doesn't seem to work for you, don't consider it your mission to announce to the world that it sucks. Just don't use it, and don't be closed-minded. I am no expert, but all this just seems like common sense. Thank you for your time.