Funny you should ask. Basically Meta-cel is creatine with some delivery enhancers. I was low on Creatine and an add at my gym keeps hawking Meta-cel - what the hell, I bought some.
And after 10 days, I think I see a difference. They promise 28 days, I'll just see and let you know. Of course the benefit might simply be my expectation of benefit and pushing harder - but the weights are increasing - so is my body weight - but staying lean.
Its at least as good as creatine - which is really what it is.