protein factory is alright, they make it pretty difficult IMO to order though. if you are adding flavor, sweetener etc. too much of a hassle to me.
i do well with a 2lb or 5lb bucket for the time being and just loading up the food. my tastes change so often and dont like to be stuck with loads of powder i dont like. i still have a batch from proteinfactory, that i didnt like....its 3 years old.