Call me a control freak, or put it down to cost-effectiveness, but I love being able to compose, edit and see exactly what my Instax is going to look like. I know that it sort of defeats the purpose of instant photos, the excitement and wonder as it develops, but at $1-$2 each exposure, I love knowing it is going to turn out every time!
It is simple to set up, easy to use and I'm still excited to watch my photos develop. Smug with a certain security that it's always going to turn out exactly as I want it, but still excited.