First, it doesn’t offer any significant or unique features beyond the competitors. For instance, Novelist (available primarily through public libraries) does some neat things with “lexile scores”–essentially, a standardization of reading level. It’s very handy when working with young readers, or simply when I don’t want to “work” at reading.

Second, it seems to duplicate what Amazon does, but not as well. Amazon, understandably, has better data, based on billions of pieces of information (everything from ratings to purchase to page views). They do a fantastic job of making that information useful and relevant. If you just want a similar book, it’s as easy as looking at the details of the book you just finished. If you want the ambigous “something good”, then you can use your own personalized recommendations.

I understand that some people will prefer using a not-for-big-profit site rather than letting Amazon harvest all of their data, but I think most people will opt for a better service, privacy concerns be damned.