Actually, I have been using this product for years now and I have always been happy with it.
However, I always get confuse when I buy it, as it keeps changing packaging and name, so many times.
I just take one or two tablets before going to the gym and it gives me a little bit more of energy to push myself during work outs and cardiovascular exercises, as well as burning fat faster.
All in all, a good product which I would recommend to everyone before exercising. Also, what I really like about it, is that, after the gym, you do not feel down and tired like you do with other products which I had tried in the past.