I don't have loads of chibi figures, but now they all have animal ears on them because of this set and it's making me love them more! The only thing I was sad about is that you can't put ears on spiky haired figures. Their hair shapes have to be super smooth on the top of their head for it to work. How bad I wanted Nendoroid Genos from One Punch Man to be a cute cat wearing an apron!
These also work on Kotobukiya's Cu-Poche figures. But you didn't hear that from me...