Seems to be working as good as a fat burner can be expected. The good thing about he ECA is it helps appetite, lets you breathe through cardio, and helps preserve muscle. I have been cutting for about 6 weeks or so and my lifts havent fallen off at all. The scale seems to move a little slower now but it looks like bf% is coming off but I might not be losing as much muscle. Its worth a shot, just dont take anything else along with this stack, it is ECA plus Y, taking any other stim or fat burner could be dangerous.