This story will definitely be a sci-fi classic. It is epic in it's scope and really innovative in the storytelling.
I loved it, and enjoyed the scientific background, the matter-of-fact tone in which it is written, the constant surprises and the enigmas hidden throughout. It really is about science and technology, but deep inside it is about humanity and who we are, about our concepts of life, time, the universe and infinity.
The whole trilogy goes into my list of favourite books ever. Highly recommended!