I disliked superpump. Im using shotgun now, and am liking it. taste isn't awsome, but I like how it makes me feel while working out.
only time I liked superdump 250 was when I stacked the left over with no explode. 1 scoop of each was a pretty good rush.
2 scoops of no shotgun though, get all tingly, and feel good while working out. I like the pumps too.
I've heard good things about 1 m.r. too, hope to try that soon.