I have the full size nautilaus but I prefer the mini it just seems to work smoother, I also have the fancy metal case for the mini I like it because it is cute and easier to grip than the glass was, and a choice of airflow is good my batteries are two 20 watt eleaf isticks , one blue one pink and a eleaf 50 black -bought the 50 so I could drip haven't had any issues with it yet. I also do a little DIY for the fun of it, haven't found the holy grail of ejuice yet.