Are you considering one of the basic models, basically just a high quality hose with a nice elbow at the end, or the fancier model with the electric valves?
Other products that try to make the chore easier are:
RV Sanicon - A pump and hose system one of whose advantages is a small diameter hose that is easy to handle and store. Like Sewer Master, there are several models in doifferent price ranges.
I was checking out the one that was listed with CampingWorld....wow.....great reviews. I have a Class A Gulfstream, I dont know if that unit would work on a large coach? It seems like it is for a Class C or trailer???
I am assuming there are lots based on quality, if you have any other recommendations that would be great!
I have a class A, it worked well the one time I used it (The rest of the time I use 3" hose like the rest of us)
I'm sure it will work well the next time I need to use it too, The only reason for not using it is I have yet to install wireing for it (I ran it of an portable jump start battery the one time I used it)
The Jet pump system should work well too, however one suggestion.
I have 3 holding tanks, Black & Front gray empty via the same connection (seperate valves) and a rear gray which has it's own outlet
I have several hoses... ONE hose is black, ONE is gray, the rest are used for fresh water You can guess what the black and gray hoses are used for
The Sewer Solution will work on any coach with a standard waste valve. I'm no sure what gave you the impression it was for Class C or trailers, but it is not just those types.
Personally I prefer the RV Sanicon. It doesn't require a good supply of high pressure water to operate - just 12 VDC for the pump. And the small diameter hose and excellent sewer elbow (connector) is a plus.