I love SimpleForm, but I still wouldn't want to roll my own administrative interface. With RailsAdmin, I make changes to my database schema, or add a new model,

I love SimpleForm, but I still wouldn't want to roll my own administrative interface. With RailsAdmin, I make changes to my database schema, or add a new model, and those changes are automatically reflected in my admin interface. One less thing to maintain. Also, I don't have to write any CSS, I get PJAX thrown in for free, and I inevitably have clients say "oooh, pretty" without any extra effort on my part. They also say "How did you build this so quickly?", which I have no complaints over.