No, I have not noticed a rebound. But you may notice "stablization." While on UCP-1, I hit a low of 168 pounds (from 174) and am now at 172, about one week out. But this 172 is very "tight." According to my calipers, I'm down to 7.8 percent BF, down about 3 percent (!!). Of course, these measurements are fallable. But the "feel" of my musculature through my skin is proof enough for me. It really does feel "tight."
(Man, I don't really like that word....)
Since quitting my cycle, I have been on only multivitamin, milk thistle, an antioxidant formula from Now Foods, 4x R-ALA, and one Thermorexin per day (prior to cardio). Again, no weight gain. And believe me, I gain weight wicked easy.
For me, UCP-1 proved to be a good "supplement." There were no sides for me whatsoever. (In my notes, I say that I had some lethargy, but this was because I was coming off ECY stack.)
If you do choose to use it, I would recommend:
1. Start slow. Watch for side effects. Gradually increase dose to recommended levels after about 3 days. (This is what I did. I just didn't want to be rash.)
2. Use antioxidants like Milk Thistle (I used Silymarin from Now Foods) and R-ALA. Can't emphasize that enough.
3. Use moderate doses of an E/C or other thermogenic stack.
4. Maintain a high protein diet, supplemented with some fruit.
5. Drink lots of water, up to double the amount you normally do.
6. Avoid alcohol or anything hepatotoxic.
7. Try to keep up your normal routine, and always do your cardio.
I'm sure there's other stuff that I missed. But I hope that helps you. Of course, if I've made an error, someone please correct me.
Regards.