just got the kanger pro tanks... mmmmm-nice!!!! they do have an airy draw, much like the EVOD, but the taste is better because of the glass. The heads are pretty much the same as well. These pro tanks are super easy to recoil yourself. These just my be a vivi nova killer for me!!!! I'll see how they hold up as far as leaks from where the glass is attached to the bottom base.. the inside of the bottom base is the one thing i think they could of done a bit better. there is a rim around the plate where the coil screws thus not leaving a lot of room for juice to flow into bottom of coil, also meaning you have to have pretty short wicks-no biggie- if you get a dryish hit, just give the unit a quick tilt!!- i havnt had a dry hit yet!!! - so far im happy azz with these and recommend them to anyone to add to thier collection!!!!!