This is a bit of a tread Hijacking but...
Many folks use them and it works for them. I had one installed and it jammed and would not work again. I installed a new one myself. It stopped working after a few months. Came home early to dump a full tank.
After receiving the parts from Amazon I redid the entire system with the original larger pipes and new valves and in a better place in the compartment. And with the 12v now freed up, I added a light to the compartment. I use a clear 90 degree with a 9" extension. I no longer have to get under the RV to attach the sewer hose.
The macerator pump was attached to the underside of floor directly to the rear of sewer compartment and in empty space there with two in/out holes for hoses. I have a 25.3 so your set up maybe different.
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