SuperPump Max kept my head and energy in the game throughout the entire workout. There is no crazy caffeine rush or crash but rather a sustained energy and mental focus to get through tough workouts.
I love taking this before a workout. I haven't tried Jack3d yet but my friends say that they like Superpump better. I'll take their word for it, and as long as I continue to feel the rush of NO in my muscles before lifting, I'll keep buying Gaspari.