There's nothing wrong with an interesting story, well told. If you expect everything to be of earth shattering quality and worth then you're just setting yourself up for constant disappointment.
The book is good. Not a contender for best novel ever written, nor will it be responsible for altering the course of human civilisation as we know it. But then, it's really not trying to be. It's a simple adventure story (literally, if you get the reference

) with a unique hook. As I said, if you've no interest in or knowledge of 80's pop culture then most of it will probably be lost on you. So yes, it's niche but that's sort of the point. It has a very specific intended audience. It's not meant for everyone.
If I had to sum it up as a story, I'd say it's like a cross between 'High Fidelity' and 'Sword Art Online' (yes, I very occasionally watch anime. Also John Cusack movies. Sue me!)