I've looked at this macerator toilet as well as a composting toilet someone else suggested to me. I guess I still like old fashioned tried and true gravity. :)
The macerating toilet looks rather complex. What happens with an electrical failure or a blade clog? The only plus I see is the ability to place it anywhere you want away from a tank. In a Class B that is not all that critical at least in the Sprinter. I'd still want a separate black tank from a grey tank mainly for clean sanitation in dumping. I will get a macerator but will have the option to do the standard 3" slinky hose two valve (grey and black) gravity dump. My black tank will be 18 gallons which is an increase from my Great West Van Legend 10 gallon tank. We go about 4 days between dumps now with our 10 gallon and it is coupled with grey tank fill and fresh water fill fairly well. So all three are usually taken care of on the same day at a campground. My fresh water will increase from 29 gallons to 40 gallons and my grey will increase from 20 to 28 in our ordered Advanced RV Sprinter. I think that all will increase dumping chores to weekly.
The composting toilet seems like an extra maintenance chore. Where do you get coconut fiber and where do you easily get peat? Where do you dispose of compost on the road? You still have grey water and fresh water chores and they don't seem to be in synch with composting chores. Back to square one. I like to take care of all three at the same time at a planned stop.