I've been taking the new decaf RagNOrok, and it's a phenomenal product, VERY good stuff. Pumps are pretty outstanding,is great, and focus is very good. I threw in 2 caps the last 2 workouts, and tried a full serving of 4 caps without Rag. The stuff is just silly. I can't comment yet on anything but pumps from Nitroceps, but I can tell you that I've never experienced anything like it. It's the most arginine-type pump I've experienced.
I look forward to running my bottle of Nitro solo.