I finished End of Watch. Thoroughly enjoyed it and give the trilogy a solid B+. As for the ending...
I think it was perfect. SK could have gone in so many directions and he chose the one that put a real ending on this story. (I was afraid he was going to have Brady jump into Holly and then force Bill to kill her in order to kill Brady.) I for one like that this particular 3-part story is ended. Whether he picks up with Pete and Holly is to be seen, but Brady is done.
Or is he? Remember, there's still lots of those Zappitt's out there.......