Xenocide by Orson Scott Card - What is the best thing about it?

I am still reading the book Xenocide by Orson Scott Card. I think this might be the longest it has ever taken me to finish a book. Now don't get me wrong - I love the book, it is just that I have not had much time for reading recently. Alright, now moving on. This week I have decided to tell you all about the best thing about this book. In my not-so-humble opinion, the best thing about this book is the fact that there are essentially two stories going on at the same time. While they are connected, they are unable to really directly influence one another.

The reason that this is the best thing about the book is simple. It builds suspense. Both stories have their own characters and their own setting and their own events. The only way that they are connected is that  if the characters of what I have come to think of as the second, less important story, fail to do something, then the only character that both stories share, Jane, a super-intelligent computer program, will die. This builds suspense because the characters of the first, main story depend on and love Jane, but there is not much that they can do to influence the actions of the characters of the second story, so they are effectively helpless to help Jane. This leaves the reader feeling just as helpless, and hoping beyond hope that the characters of the second story don't screw up, effectively creating a lot of tension and also getting the reader very caught up in the book. That is why the fact that there are two different stories going on simultaneously is the best thing about this book. I hope that wasn't too complicated for you.