I bought a used one. It sat around for ever but we just got an apartment account that consists of 5 high rise buildings. We now use it there all the time. Its not bad at all for that application. Faster setup than using a portable, and its light. It does leave the carpets pretty wet but because of the high flow, it cleans fairly well.
I would never use it in someones home though, way to clumsy to move around furniture.
It's a good tool for a specific purpose. I just haven't got used to it. I used it without a glide and it sucks a$$, you can only pull it backwards. Put a glide on it and you can push it forward and back with ease. I love heat and use my #3 little giant heater wether or not portable or tm setup. What I dislike about it is the hose weight and rubber impeller for the discharge. The heat will kill the impeller.