The colors are quite particular, I take it's at least Fuji Velvia simulation ?! could be in part my browser.
What I've noticed is that it takes a different processing if you want to print in Instax, usually the print is very contrasty and requires the shadows to be lifted quite a lot. It does open a conversation and increases the willingness to be photographed, plus the additional weight is not that much. Kids love it when they get to see the photo developing in their hand.