I saw the Cimex a couple of months ago and was surprised to discover what the system actually involved.
It's a triple headed rotary using chrystallising foam, but it's not applied / aggitated by brush, it's really weird, when you first see it, but, it does seem to work.
I've been contemplating something like this for some time, but it has to be much lighter, as I want to be able to carry it without endangering my already knackered back.
If anything comes of this, I will post on here.
rob m
ps
what puts me off, is the need to vacuumi, AFTER cleaning.