Honestly it was just a good game. I saw it attracting both Potterheads and non-Potterheads. (I would not consider myself a Potterhead).
Does it have a bunch of replay value? Not really (neither do a lot of games). But man, that initial playthrough was just really good. It also looks like I clocked 113 hours on the game, so that’s a pretty decent return to me.
Also, despite the source material and the author, it had a lot of very inclusive elements, which were a nice touch.