I used the Bonzer on a trial run last week, Used it on a bunch of jobs. My cliff notes....
Extremely good on CGD, extremely fast dry times (the fastest I have ever seen in any tool, even faster than my rotary dri-master).
Very consistent cleaning paths.
Very compact unit when the handles collapse, stores nicely in a crowded van.
Awesome to use on area rugs, you can stand on the rug and clean on the push stroke, rather than have the carpet bunch up on you as you pull back with the wand
The jet angle under the head has great "shear" cleaning properties
Not the easiest to use in residential environments, getting behind doors and into closets were considerably more effort than a wand, also on residential carpet it didn't slide very easily for me. In fact 1 job I didn't even finish with the Bonzer because the carpet had too much nap and I was tired of pushing it after 2 bedrooms. The front of the head would lift off as I started pulling back and would leave a wet area also on that carpet.
If you regularly clean carpets without pre vacuuming, it has a harder time lifting loose debris than my similarly glided wand.
Things I would change
Jet size, the one I tested has a total flow of 5. 5 X 11001's. For CGD I would run 5 X 11015's. It has plenty of extraction and I think the flow would help
For residential cut pile I would in 5 X 11002's.
I personally do on average 80-90% residential and 10-20% CGD. Because of that, I probably won't buy one (or the zipper). I absolutely would buy one in a heartbeat though if I did 50/50 residential/commercial. The price is right and it's much much lighter than the zipper
Thanks again to the guys at Rotovac for allowing me to try it!