Pretty good, a few annoying errors. I think the catching feature for pokemon is really great for the game it is, AR mode isn't great, it is good for quickly checking to see if a pokemon is shiny.
The music is pretty good too, I especially like the Halloween night music.
Sound effects are alright, nothing to complain about.
Definately good to play as long as you have decent mobile data. If using data isn't an option download Ipogo which is a hacking software that make it so that you don't need to leave your house, but it definately takes away from the gameplay.
Story isn't very good, not very much of one anyways.