I've got a vaporbox which is sort of a knockoff vaporbrothers. It has a ceramic heating element. Its supposed to be more consistent in regards to temperature. I've actually found it to be better than a vaporbrothers which I've used a few times.

Anyway, mine is going at least 2 years strong. The heating element has a lifelong warranty but I haven't had to replace it. What I have had to replace at least twice were the glass parts of the whip you actually draw the vapor out of (its the tube part). I guess these things happen though.