I gained a little weight back, but I also picked my smoking habit back up too. I'm thinking that's why I gained. I didn't gain more than 10 pounds though.
I have! When I first started taking it, it gave me small headaches. It made me drink more water which made the headaches go away. I wasn't as hungry and it helped me eat smaller, more meals a day instead of 3 big ones. After about two months I noticed the weight disappearing. I lost 15 pounds and didn't realize it until my jeans slid on with ease one day!