I ordered blu to quit smoking real cigarettes. I hate it. It is extremely inconsistent, hot, unsatisfying. I have to use a new cartridge after 15 puffs. It is supposed to contain 16mg of nicotine. I only smoked about 5-10 cigs a day previously. Theres NO way I have gotten even close to 16mg out of a cartridge. I emailed them a week ago and no reply. I don't understand the lingo you guys use on here and don't understand if I have to fill the cartridge or not on some of the other brands. From what I've seen the RN4081 looks amazing! Where can I get it? Do I have to refill it? Is there a better mini? Help!!!