I give a big thumbs down on all the herbal versions. The real ECA stack gives me a very noticable speed like rush. I never get that same feeling from ANY of the herbal stacks.
How about ripped fuel? I've never used any of the fat burners because I stay pretty lean (atround10-12%) & don't plan to cut untill I hit at the very least 270 (which hopefully will be with this cycle) I've used ripped fuel for energy before workouts & it seems to work great for that.
I am on Xenedrine now, I will let you guys know how it ends up. Right now I have AWESOME energy when I workout... I take one in the morning when I get up, then one before I workout.