spectro was good, but not magical like many seem to think. I;ve used other ones and thought they stacked up just as well, currently using quest and as my progress pics attest to, I've gained crazy amounts of size
Spectro was awesome, I used the Ethanate, EQ, and Fina. Very good stuff! I found the Fina the most suprising though - going for a single or double in the deadlift and ending up pulling 6 reps.