It was very successful for me while using it, but you have to follow the instructions re eating fat. I lost 3 and a half stones, all of which has returned but that is down to my poor eating and lack of exercise.
I have not taken them but just reading about the side effects would probably stop me eating anything with fat in it in the first place. Maybe a good idea to use them on a day you are staying in? Buy cheap undies and don't go mad on fat foods and i'm sure you will be fine. Good luck, I hope it works for you.