The Separett is gaining its defenders. Two blog posts, (one from Marg, and one strangely anonymous), both say the Separett is more civilized than I made it out to be.
It is true that the poop handling is done infrequently (only when the bucket is emptied), the cost to purchase is much less, and they are quite popular in Sweden. Plus, the Cinderella requires electricity to run (which is expensive on the island), and there's no backup in case of power failures.
Hmmm. Decisions, decisions.