Hello I currently have a KangerTech EVOD adjustable up to 4.8 I am not sure what tank i have on it as someone gave it to me. I love the style of a pen because I dont have to carry a box in my pocket. my friends all use the MVP and they have a different tank on theirs that allows them to adjust the air flow. The things i like about theirs is I dont have to drag as hard to get a lung full of vape, and i do love the larger tanks so im not refilling it. I think I fill my 3ml tank about 4 times a day at this point. I love the look of the VTR but hate the face that switching tanks is not seamless. I love the billet box mod due to the size of the tank . can someone steer me in the right direction for something to vape with? should i stick with a pen, should i go to a box. I was a heavy smoker and want to make sure i do not back track. my pen battery only lasts about 5 hours which is also a pain. my other limitation is money i dont want to spend $100 at this time on something