I read a lot of fanfiction so my opinions may be a bit biased. If you've read a lot of fanfiction I'm sure you'd agree, but fanfiction can be of a very poor quality. Compared to most of what I've read in my life this is of a pretty high quality. I personally love this story, the dialog is solid and by that I mean it feels like plausible human conversation. The pacing isn't atrocious or wacky in any way I can discern. Generally I can't find any problems pertaining to the novels quality. As for why I rate it so highly, I would have to leave that to my own personal interests pertaining to the story's premise as well as how invested I've become in the characters and plot.