You would definitely be better off buying some juice, then you can save the carts for if you decide to return it, I own a blu, 510, and a ego and love them all and I give allot of credit to the blu for getting me off the analogs, I received my blu in less then a week and besides the short battery life haven't had any issues, I use the PTB mod with it if I am not dipping, but dipping really does great with the blu..