I heard from a 3rd party that clenbutrex is a bit of a waste, of course stim is based on the subject taking it, i was informed it was light, if any response to the stim.
I've read some good and bad things about cytolean,
I will note that I've heard some pretty good reviews from meltdown by VPX, a lot of people that i've talked to felt great stim from it, and saw great results, def had increased body temp, and energy.
Again this is all that I have heard nothing first hand
I can tell you Vapor-xt by AMS(not out just yet, but coming soon) is going to be something your going to want to try, you can check my log out. I've experienced real good stim, and themo effects, i like it alot.