We all know how effective Neurostim is through the extensive feedback provided by various members of this board. So rather than to rehash all the similar details of how effective the product is, I'll just provide you a link to my previous review of the original Neurostim sample (without caffeine) as my opinion on the product still stands:
http://forum.bodybuilding.com/showthread.php?t=341063
Now on to the nitty gritty. Taste.
I have to say that it's a step up from the original Lemon Spark flavor. The orangy/pineapple aroma I get (that kinda reminds me of citrus or Carribean fruit punch) comes through stronger and manages to temporarily hide the taste of the active ingredients; unlike the Lemon Spark where I could taste the actives right through.
However, the pungent aftertaste is still present upon finishing the last sip of the new flavor. I suppose it's hard to mask the DMAE, Huperzine A, and Vinpocetine, though, and give Marc credit for trying to improve the taste nonetheless.
In any case, I think for the slight moments where I can taste the flavoring, it seems to have potential for the next new Substance WPI flavor.
So for those of you that didn't mind the way the original Neurostim tasted and want to try something new without sacrificing the effects, the new Orange Pineapple Neurostim is your ticket. As for the rest of you, the sharp mental focus that you get from this product trumps any desire for better flavoring!