Might as well write a review, since I've read it, but try to do so without giving away any spoilers.
This is one of the better books in the series - the action keeps going, the suspense and tension works, etc. There's actually a lot more action than I can remember being in any of the other books, and a lot more deaths. I lost track of the number of second-rank characters who got killed about halfway through, and a fair few first-rank ones do as well.
In terms of tying up all the loose ends, it pretty much manages it. It manages some decent twists, some of which would certainly be helped by an eye for detail in the previous books and a good memory.
A good ending to the series? Yes. Any good sermon illustrations? Most certainly, but not necessarily the ones that were expected.