I've used it for a few years and I do think it does what many claim. After a couple of tablespoons, there is a subtle change in metabolism..I get warmer, breathing rate changes.
I can't speak much for it's wieght loss claims because I seldom cut and when I do there's usually some ephedrine involved.
If you have dry skin, CO will definitely help both from eating it and using it topically. It's one of the best aftershave skin toners I've ever used...really soothes razor burn.