Been using for a few months now. I use it for all my roof and house cleanings. I just got a 20k a year contract for cleaning recycle bins at a local stadium and will use the other pump for it as the cleaning products I will use can not be mixed with SH. So glad that I have the dual pump so that I dont have to buy a whole other system.
As for cleaning roofs and houses with it, it far surpasses the Shure Flows and the Delavan Fat boy that I used prior to going to this system. I have never had a problem with it over heating or even coming close to draining a battery. I have only used one of the pumps so it's great knowing I always have a back up should the one I use fail.
I personally feel it's the best system on the market dollar for dollar for non pressure roof and house washing. I can easily get 40-50 feet using a zero tip depending on wind.