I'm not sure whether I'm not reading this fast enough (i.e. spending enough time reading it) but it feels like nothing is happening and the story is starting to drag.
At first I found the present-day stuff with the psychiatric computer amusing, but it's starting to be the same thing over and over again. So far Bob has completed his training and met Klara, but that's about it.
The mysterious Heechees are interesting, but somehow I doubt we ever learn more about them, at least in this book.
Anyway, this is rapidly going from a possible 4-star read to maybe a 2-star, if that.