I have two on my van gazz.Many have seen pics on here and a utube video.
It's quite tiresome explaning the technical aspects over and over, but they work wonderfully well.
Many don't like/ don't agree etc, so there tend to be niggles such as you get about using hot water, from people who know nothing about it.Some use trolley', or are mainly commercial, so there is less of an advantage, but for the busy guy who has a lot of domestics they turn you into a flying machine.With two operaters you are virtually flying the tardis.