Buzzzlove The cart came free with my DCT so I cant really complain about it, but I did go through a whole pack of their DCT cartos. I dont know if it's just me, but I could not get one of those cartos to run reliably for the life of me. Just moved to single coil Boge's and absolutly love them with my tanks. They produce the same/more amount of vapor as the DCT cartos at less volts and make my batteries last longer : )