I've read a couple of the Ace Atkins Robert B. Parker books, and was surprised to find that I liked them a lot. I've read all of Robert B. Parker's originals and loved them. I liked the SPENCER TV show, too.
The Spenser TV show was a favorite of mine. I have all three seasons on DVD. Robert B. Parker wasn't really a fan of it, but I think he was wrong in this particular case.
And I used to be very against continuing a series after an author dies but between Kyle Mills taking over the Mitch Rapp series after Vince Flynn's death and Ace Atkins taking over the Spenser series I've had a small change of opinion. The first two books Atkins wrote in the Spenser series made my Top 10 list in those particular years..
Meanwhile, I'm currently trying to read an advance copy of the upcoming P.J. Tracy book DEEP INTO THE DARK.