Are the cimex s much quicker on commercial that a ordinary rotary. I clean a bank hq and i m thinking this machine look s ideal.
Are you using a porty; locked inside the bank, or a t/m sitting outside.??
It really doesn't matter, (apart from the security aspect, I.M.H.O.).
If you are cleaning commercial carpet, I would say that 99.999% of the time, not only will the Cimex give you a better result, (especially on polyprops:), but will also be quicker.
The following is strictly my honest opinion, others may disagree, but that's okay.

Benefits of a Cimex:
Quicker set-up and break-down times.
Quicker dry times.
Less chance of wick-backs.
Less chance of opening a bad seam.
Much less chance of over-wetting the carpet.
Less chance of damp carpet next day.
Less chance of odour problems when dry.
Less chance of condensation on the windows.
Much quieter, and no odour compared to a porty; working in the same area.
Much less security problems being due to the machine being inside with no unlocked doors/windows.
Of course, all of the above also relates directly to the solution that one may be using in regard to odours.
Downside:
Occasionally, the carpet may need to be extracted to remove any build-up of deep down soils.
That's it, I'm stumped.
Shorty.