Just finished this book this morning.
It's obviously a huge improvement over the painful Rough Beasts of Empire; but I found the quality of writing in this to be... not great. I've sung many praises for DRG in the past, but sometimes reading this I felt like I was reading a young adult fiction novel. This was mostly during the many many re-cap scenes, I guess, where things to do with the overall Typhon Pact story were being explained. Pages and pages of poorly written exposition.
I found the end result of the novel to be very lacking in the impact that many here seem to have felt. It seems to be a place that Trek often goes for dramatic effect when they can't think of anything better.