I've used it and yes, I think it is very good. Does leave a spotless finish. Only thing is the filters don't seem to last anywhere near as long as they quote.
Regarding cleaning wheels - I got a special "AutoGlym" brush - which was a conical shape, made out of hairs twisted in metal. The end had a plastic cap. I was cleaning my alloys and this plastic cap came off leaving two razor sharp cuts of metal protruding. Result - one alloy COMPLETELY covered in scratches.
I got a nice plastic brush now, specifically designed for cleaning alloys. That combined with the autoglym wheel cleaner does a good job and cuts down on the effort.