OK, here's my review. It works as advertised ( without need for more hose clamps). Grey water dumps just fine. The whole process is slower than the stinky slinky, but that was known before my purchase. The reason I bought it was on my MH I have a issue using the normal sewer hose as it exits my drain too low causing many times sewage needing to run uphill.
This pumps it uphill without a issue and with a allowable bend in the hose coming out from under the MH. The only thing that bothered me was dumping the black tank. You can visually see it with the extended elbow I needed. When you see clumps of toilet paper starting to come down to the pump section I cringed it was going to plug it up. Well the first time it sorta did a little. But that I think was because just before I started the dump process I made a deposit upstairs. I don't think that toilet paper was saturated enough with water and caused it, as it was towards the end.
It wasn't enough to stop fluids from pumping. So I shut the black tank valve and back washed it with the pump jet and was able to break it up, opened the valve again and everything worked fine. Our second a week later dump went without a hiccup.
So I believe I will be very pleased. No smell at all, and the hose is cleaned out with the pump with clean water after every use. One of the cleanest ways to dump and very easy to store, very compact.