I have read them all now, except the latest, Exit Music, which has not yet arrived at the library. I think the ones in the middle of the series are the best, from Tooth and Nail to the Falls, for instance. But anyone who has only read Knots and Crosses, and been disappointed, should persevere as the later ones are much better.
I have not yet read Blood Hunt, but Witch Hunt was excellent, while Bleeding Hearts was not so good, but certainly different subject matter.
As for Ken Stott as opposed to John Hanna, I also think of John Hanna when I read the books. Ken Stott might be the right shape, and no doubt a good actor, but I wonder if the person who wrote or directed or produced the series actually read the books? Something missing there, though the actresses playing Gil Templer and Siobahn certainly fill the bill.
I always look forward to an appearance by Big Ger. Big Ger and the Strawman. What a pair!