The grape flavor make me shudder. R4W 5.0 should be labled 'Grape Death'.
I like 6.0 because I also have a preference for a strong nootropic vs. raw energy. With the 'raw energy' aspect I feel that it is similar to a bell-curve where it is a fine balance of getting just enough before too much starts working against you.
On the other hand I've never had an nootropic ever be 'too much'. I might wind up ordering some more 6.0 before it is all gone. The R4W caps are a nice touch, plus it is extremely convient since you can throw back the pills, but I gotta say R4W 6.0 is still my preference.
Actually since R4W 6.0 clumps up into little chunks, every now and then I'll open the tub up and pick out a little chunk and eat it, b/c I like the taste. Damn I'm one sick mofo'.