I'll be frank and I'll make some presumptions.
From your post history, you are pretty new to photography (nice military scale model shots btw)
The guys who use a fixed focal length camera are usually those who already know what they want or at least have a rough idea how the fixed focal length is going to work for them.
Its a risky deal jumping into such a camera based on hype and hearsay.
But that said, if you have the tenacity to follow through and also try to learn from the shots ppl have taken with this focal length (and camera), it will deliver.
Else, it makes no difference if its Coolpix A, GR or even X100s, and you may be better off with something that offers a more variable focal length selection.
I'm not a GR user, but even for lenses on DSLRs, I will need to keep using a specific focal length or new lens for a couple of weeks if not more to get better comprehension of what it can do for me.
My few cents.