Stims mess me up bad too sleep-wise...it's a shame they're the only thing that really works for speeding up fat loss. I tried a non-stim fat burner (Species Nutrition's Lipolyze) for awhile, and it helped some, but nowhere near as much as a good stim-based fat burner works.
I'm usually okay with them. yesterday was my first day on lipoflame and I probably should not have taken it at 4pm. That may not have even been the reason for it anyway.