Im trying to find a good tank for my mom, shes been a pack a day smoker for the last 40 years. Shes tried some sub ohm tanks and hates them, definitely wont go that route. She needs a mouth to lung tank, and i will probably buy her an istick 30. Ive read good stuff about the nautilus and eleaf m something tanks. She needs something fool proof. She will never rebuild coils and needs a tank thats easy to fill and wont leak, something thats extremely user friendly. So does anyone here have alot of experience with above ohm mouth to lung tanks? I was thinking the nautilus but have read some stuff that made me think it wont be the best for her. I want her to get something that performs well so she will have the best experience and chance at quitting smoking. Thanks for the help.