My last order from AMINOZ had 4 samples of PWO's included. Here's my thoughts on them (CTD's Noxipro, iSatori's PWR, San's FIERCE and Bpi's 1.M.R):
CTD - NOXIPRO
Sample sachet includes 2 servings, but being a sane tester for a new product, I just had about 3/4 of a serving. Good taste...