This stuff might be interesting, but does not seem worth it. If they cannot retain a relatively consistent does in their pellets then I would be very wary of their products. Obviously, pressing the pellet would not be the problem, and the actual pellet should contain the same amount of a heterogenous mixture of the active compound and impurities and cuts. So, if they truly are being honest vendors (which I doubt), they cannot control the reaction yield to any reasonable degree. It makes you wonder what side reactions they are allowing, and what nasty chemicals might be synthesized by mistake and added into the mix. The best case scenario is that they are simply left with less product and more of a harmless reagent, but who knows with these guys. With such a shoddy product, you might as well try MDMA pills. You run the same risk of low amounts of the active chemical but at least you are running the risk with something like MDMA, a superior chemical to many people. Also, there are websites that can help identify pills to help you discern quality, and if you get molly you should receive a relatively good and pure product unless you are dealing with assholes, which has rarely been in the case in my past experience.
These are just my feelings, to each his own.