It is one the best sci-fi books out there. You will love the way it ends. It brings us to realise what we know and what we presently dont understand in the field of physics.
I made it through all three books and really enjoyed them (especially book 2). But I have to admit that I don't know how to feel about the ending. Definitely not the ending I anticipated.
The sequels are as excellent as the first in the series, so if you read the first and really like it, read the others too.