The Fujifilm Instax film has a nice size with a very stable chemical plastic devices despite the limited operation. The color rendering is daylight kind whatever your lighting. I think it is not comparable with the Polaroid / Impossible movies (do not confuse the marks), for me they are two different worlds. Instax offers a more neutral picture while one is still surprised by the impact that provide Polaroid film and now Impossible. The price is to the advantage of Fujifilm, although I still prefer my Polaroid in the end.
However expected always a new black and white chemistry from Fujifilm does not seem to listen to its customers ...