I think:
Bonnet systems have their place, that i am not disagreeing with. But lets me honest, you would need to change a lot of them to get a realy dirty carpet clean.
If you want your clothes cleaned, you submerge them in water, and that is why in many peoples opinions, water fired under pressure into the carpet pile and extracted is the logical solution.
Please bare in mind one thing.
The people who market these systems, are also in the business of making money and there are people who will buy into a syatem because of its low cost. I have seen these bonnet systems on prochem courses and was not impressed.
The product is left in the pile.
People want dry carpets, but not many asked me this if i am honest. I do now make a point of telling them with the tm.
Water recycle machines in my opinion are another fad gadget. Again the manufacturer wants to give themselves a unique selling point to tempt buyers into this system, with claims of this, that and the other. A water shortage, we have not had many of these. I am on a water meter at my house, and somedays i take 60 gallons with me, but i don't worry about it. Think about all the hose pipe users with no meter and how much they use. If you said to a customer about recycleing water in a machine like this, they would'nt be interested.
So what i am saying is do not buy a machine like this if you think it will give you the upper hand with your customers because of the recycled water issue. Big companies are experts at marketing their products, and usually there are hidden costs as well. I expect you would have filters to renew, and i bet the customer would rather fresh clean water.
I can remember one rental propertys carpet had a sweet that had melted into it. No problem, full heat and high pressure, straight off. Try doing this with a pad.
Dave