For what it is worth, a Cimex used in conjunction with HWE and following all of the proper standards, is a fantastic system. I am not talking about encap work and then let it sit and dry vacuum, I am talking about proper pile lifting followed by vacuuming; then pre-spray followed by the use of a Cimex (15 inch works great in res. work and fairly easy to move around) but use nylon brushes not pads. This is, IMO, the best and easiest way to prepare the carpet for HWE. The results are great, it makes easy work of beat down traffic areas and the last inch before a transition area.
I have been cleaning this way for almost 35 years, started this way in 1974 and never changed it. I have been through all types of scrubbers and rotary machines and always found the Cimex to be the heart of the operation.
Use the same system, with oriental rugs; wall to wall wool carpets and anything else that needs it. By the addition of a shampoo solution used through the Cimex, the ability to remove a lot more soil is easily accomplished. Shampoo lubricated the soil along with the high impact of pre-spray, great results and soft hand to the carpet when completed.
Here is a little clip to show it as an agitation machine with the brushes. Notice how easy it is for even a 'Girl' to use it, (only kidding, I work with several woman). This will go across the edge of a carpet, even a small one and not cause damage. When you see it run over its own cord that should help one see it does not cause damage to a carpet, a seam or anything.
Just my humble opinion but after 35 years of use, I simply would not clean carpet with out the Cimex as part of the program.
SA