I used it(still do occasionally if I eat something higher fat). I have been trying to lose 25 lbs for almost 6 years!! It was a bit of a placebo effect for me.. I was afraid of the side effects,so it pushed me to eat better. I was only losing 1-2 lbs a week, but after about 4 months I have lost a total of 18. For the past 6 years, I have tried, over and over.. to no avail, so for me it has worked. I only had side effects once or twice(after fettacine alfredo and fried fish). It was just gross to look at, oily stuff when you have a bowel movement. it really also helps you to look at food differently thinking that if that oily stuff didn't come out it would be in me, poisoning me, ya know. I bought mine off ebay for about $45 for a bottle of 120.