from what i have seen. the company gets mixed reviews. from talking to people who i know have used different products the general opinion is you can get something that works just as well for cheaper from another company. A lot of people dont know this but cellucor actually wont allow a company to carry its product without an agreement that they will sell the product at a certain price. When i worked at a supplement shop we were buying the d4 for 16 dollars but were selling the 60 caps for 50 and the 120 caps for 80 because celluco wouldnt allow us to carry it unless we agreed to that price. From the people i have talked to about thier products i get the following reviews:
d4- its 60/40. about 60 percent of the people didnt like the product and the other 40 did but that it was too expensive anyways and wouldnt buy it.
m5- most people say it was too expensive (85 is what we had to sell it for) it got middle of the road reviews. nobody would buy it for the price though. i got to try some samples and the energy wasnt good, but the pumps lasted longer than most pwo products. the other product i have tried that gave better pumps was wtf pump'd by alri.
p6 extreme- this product actually got the best reviews. most of the people really enjoyed it as a natty test booster. but once again nobody thought it was worth what we had to sell it at ($99)
p6 black- only had one person try it and he enjoyed it, but i wouldnt take his review seriously because he was 50 and had never even taken protien powder before. It looks under dosed to me, but im not an expert on prohormone dosing by any means. i would never pay the 149 it retailed at though. we only bought them for 32.
the other products seemed to be way over priced glutamic acid called r3 which nobody ever tried and a 40 dollar bottle of omega three's which nobody tried and a thyroid formula which nobody ever tried.
hope that helps.