i have plenty of experience with it... in all honestly, if you just run it alone, you are going to be very disappointed... its not going to have a huge impact on your weight like some people may lead you to believe and it can have some long term side effects... its nothing like clen in terms of danger, but it still has its negative aspects but beyond that, its just not that great in terms of results.. .its quite minimal... the only time i ever got a lot out of it, it was because it was stacked with sarms or steroids... on its own, its lackluster at best... its good for asthma though...