I’m calling this the best because it’s cheap, It’s super easy, and its comfortable. Heck make one out of a 2 or 3 gallon bucket for the little kids to use.
When I made one with a regular toilet seat its just heavy. this is light weight and with bags it stays clean.

You just have so many options with this . If you don’t want to change out the bag with every use.

1. You could make it into a composting toilet.
2. You can cover the poo with saw dust or kitty litter.
Let me know how you could use this or make it better.