We just bought two of them. They are phenomenal for wide open commercial carpet cleaning. Although you can still use them on (average commercial jobs). Probably we wouldn't bring them out for anything under 5k.
We do some work where the runs are far too long for even our
AT, and also to large for the cimex's ( which are great machines).
It's great to walk away when you just cleaned 20k in about 1 1/2 hrs. and not even break a sweat, not to mention the money that can be made.
They definitely have their niche in this industry, and in my opinion you will be hearing much more in the future about them.
Even at only 6 or 7 cents a ft. you should be able to make several hundred dollars an hr.
-Bruce