I did for a while, seemed to work ok. I had to stop when I went on CKD because it has HCA, which can knock you out of ketosis.
It has the same stuff as every fat burner out there (HCA, ephedrine, caffiene, white willow). I stacked it with pure ephedrine as well.
Give it a try. It's better than Hydroxycut, which is just overpriced crap since they took the eph out and replaced it with... nothing.
-Diabolik