I've only watched it all the way through once.
As I recall, my biggest problem like others have mentioned here was with the lack of more commentary from musicians. It was nice to see Artie Shaw, but I thought Marsalis, and Crouch were used way too much.
With all the greats still alive today, and able to give real color, Burns could have done a much better job on that part.
As for the rest of it, I neither love it, nor hate it.