as far as i knwo there are 2 types, the normal instax and the mini, i have a normal one and whilst its ok, its no polaroid, for whatever reason they dont have the same charm. the film is half the proce of polaroid film (if not cheaper) and it had the added benefit of actually exsisting for a while longer......
i use mine for pissed up parties and time i dont want to risk my 680.