i am trying it this year. my bf measurement was 1 mm less then the same day last year. cardio same, diet same????? don't know if it is helping or not. can't feel it, the heat loss that is, always cold when dieting anyway. I don't know. worth a try, but it is not the magic answer. seems like everyone who uses it on a high level is in shape, but jay cutler uses muscletec, so what does that really mean. i am going to keep using for the prep, but i am not sure if I will use for the next time, just don't see enough to justify another 50.00 a month on more supps (100.00 if u use the somalyze). that may be just me. some really swear by it.