I appreciated the ability to be able to upgrade my stats. I mainly went with how many books I could hold, but I could imagine getting a bunch of speed ups would be helpful. It was a little weird about where I needed to stand to get the books to be accepted though, I would be standing right on top of a bookshelf without them getting accepted. Honestly, I was expecting to have to sort through a bunch more. It's a nice little atmosphere though, sorting all the books.