My 90 day warranty just went up on my 5.0 and so far so good. i had a volcano up untill this unit and have to say i am so glad i got 400 for it cause this thing does the exact same job as the volcano did for a fraction of the price, i'm running it through a bubbler and from there into a glass steam roller to max out. I also got it running in my car sometimes too, with this adapter from radio shack. its possibly the best investment i have made on a peice.:stoned: