I picked up some Craze last week after a ran out of my other pwo supp. I was just thinking it would be just another preworkout just like the rest. I normally use 3 scoops of all the others that I've tried (Jacked, Nitro NCG, NO explode, Neurocore, muscle marinade, flashover, etc) so I went ahead and used 3 scoops for my first dose. I'm a strongman/powerlifting competitor so I won't give any review of the "pump." I have to say that I was blown away by the effects of this stuff. I've been carb backloading and a little low on energy lately. It took around 30 minutes for it to "kick in." I ended up setting 2 nice PRs after recently losing 10 pounds. The energy and focus was unbelievable. I will have to give Craze a 10/10. Best preworkout I have ever tried. The only problem that I had was that I couldn't sleep that night. That was completely my fault for taking 3 scoops and taking it around 5:00. I ended up staying awake until 3:00am and had to get up at 5:45. Next workout, I took 2 scoops and had the same good effects, but I was able to sleep. I never really take the time do to reviews, but I felt this to be necessary.