I bought a prosmoke because of longer lasting battery, long lasting atty, bigger cart and all VG. I had to wash the atty to get it to vape right but after that it seems to work fine. The battery lasts approx. 8 hrs. and and I haven't used a full cart yet more than a couple days worth for a light smoker. I really like the taste and smell and vapor of the chocolate cart but was not getting the relaxing feeling of an anolog. May need more nic.