It took a bit of time (few weeks) to start losing, but I never gained more weight since starting; so not in my experience. I did notice at the beginning that I was compensating by eating a lot during the 8-hour window, because I was afraid of going hungry. After around a month, I got used to it and just started eating normally. I just make sure I eat my last meal exactly right before I’m supposed to stop, so I don’t go hungry. If I eat too late (i.e. night out with friends, etc.), I just adjust and eat later the next morning. Stopping the late snacking is definitely one of the reasons I think I lost weight.