I installed the EF-2 in my tenant's downstairs apartment, it puts out good heat, and I like the simplicity of its controls. We have had it for a year and a half. I noticed that the firebox liner warped and pellets were spraying everywhere and there were little fires below the burn pot. So I called the dealer and they replaced it for $140. Then I noticed a screw popped out and the little metal circle had fallen out, found screw, tried to refasten but it wasn't long enough, went to home depot and bought a longer stainless screw and got it to go in, but metal circle wasn't flush, it can move back and forth. Now, the new firebox liner is warped above burnpot again, not as badly, but pellets are sitting on the lip burning and combustion is all wrong: embers piling up in burnpot and overflowing. I know people love this stove, but I have to say i am much happier with the mini I have upstairs. Any thoughts?