People keep asking me so...
My experience with AG Guys is the following:
Any liquid products that can be 'felt' (i.e Clen, T3, etc.) or where the results can be quickly 'seen' (i.e Viagra, Nolva, etc.) are dosed somewhere in the range of %50 or better. Clen seems the best. Its just not that easy to get away with underdosing these products.
Any liquids that cannot be felt (i.e. Aromasin, Adex, Letro, etc.) are very weak. I ran pharma Aromasin for eigth weeks and then switched to L-Aroma and had terrible results. Even tripling the dose did not work. I gave up and went back to pharma.