WATCH was an excellent continuation of the WWW series. In fact I believe it was better than WAKE, in that the characters of both WebMind and Caitlin grew more real and took over the story. The first novel was more vested in the science behind the EyePod and the math behind creating consciousness, but WATCH was more vested in the development of the plot and characters.
Sawyer does a good job of tying the subplots together in a way that support each other. Hobo choosing which path to takes, Caitlin and Matt's budding romance and WebMind's growth as an individual all work well together.
Can't wait for book 3