Compostable toilet?

Anyone outfit their Sprinter with a compostable toilet? Is this a good/bad idea? Any advice or words of caution? I will say I have about zero experience w compostable toilets but stayed in an airstream with one and was impressed with how "ungross" it was- no smell, etc. I havent yet purchased a sprinter but want to see the country this way and the toilet is a concern. Thank you!