depends on the situation for me. On the go and work, my protanks on a cheap china mech. At home, it's dripping on a nimbus, cant be beat. On a night out, kayfun. To me the kayfun is the perfect gennie, best of all worlds. No leaks, great flavor, silica wick, ss tank, and produces big clouds. Only things about it its a juice hog and dam pricey.