Oh yes definitely, my rest times are non existent and MI40 always has between 30-40 sec rests, most of the time I can't make it to these times! The sweat, my basement is quite cold right now and normally even with high intensity workouts I don't sweat that much but I do have to say that I've been sweating a lot more recently, which makes me feel even more accomplished when I'm done. The energy, like I said before hits me quick, even though my body has gotten used to stimul8 it still hits me really good. I know within 10 min I'm ready to go! Stimul8 compared to other pre's, I really can't compare it, it's so different. The stim effect is very smooth, it's compared to SpeedX3 and XcelleratorX I think. The actually energy you get from Stimul8 isn't comparable to anything I've tried, It's just different. I'm trying to put words on it, the best phrase I can come up with is "if you decide to take Stimul8 you better be ready to do work!" The motivation, drive and focus I get blows everything out of the water. No other pre can compare to the short rest times at all. When you say there's always something left in the tank, that's an understatement for me. I never want to quit my workout, I'm always thinking of the next exercise! I literally have to force myself to quit most the time. This alone is a seller in my book! This sh!t is crazy! But in a great way.