I have been using the RV SaniCon for almost four years now, and hope to never have to do without it again! I have had a few technical issues with it, but have been able to fix them all myself without issue.
The major advantages to the macerator to me are that I don't have to store sections of stinky slinky, I can pump up hill if needed, and I don't need to store and use the plastic expanding leveling system that makes the slinky slope properly to the sewer.
I used the normal setup for several years in our other RVs and am happy to now be a macerator user. When we were in Florida last, I had to pump my tanks almost 100 feet to a septic tank. Worked great!
The disadvantage is that it is a little slower than a regular system. If you are in line at a dump station, it can take a little longer. That usually never affects me, but did when we were in Quartzsite. I could have purchased a short length of slinky, but wasn't worth the hassle of storing it.
If you do buy another stinky slinky, get the best quality possible. I think there is a Rino Tube or something like that. I have heard good things about those. Also, make sure it has good connections, and you can expand the system. I have seen sewer connections 25+ feet from the RV!
kev