I really liked the writing, the lead character, the family relationships, and the twisty mystery. I'm not sure I understood all the tech details and the parts I did understand were scary. If you think Harriet the Spy mixed with a large dose of algorithms and data points sounds good, this is the book for you.
I liked Claudia well enough; she has a penchant for comparing things to various books that I found enjoyable ("That man is harder to read than Finnegan's Wake"). I also enjoyed the insider's look at online dating services. But... there was something about the book that just didn't make me want to read more.
