Here is the ranking of the single volumes I found helpful to read each week in preparation for an expositional series through Mark: 1. Struass (ZECNT); Edwards (Pillar); Hiebert 2. Lane (NICNT); Cole (Tyndale) 3. MacArthur; Hendrickson
Non-standalone volumes included Wessel (EBC); Garland in ZIBBC (helpful with background); Later in the series I picked up Bock in the Cornerstone Biblical Commentary and found his brief comments helpful.
France and Keller I did not find consistently helpful and stopped utilizing them.
Not terribly complicated and he does make some interesting points. Helps point out how sections of Mark's gospel tie together and how the book is organized. He has written a lot of other commmentaries and it is annoying to send us to those for explanations of certain points. However, the book does okay without going to commentaries on other books. I like to read a commentary on the book we will going through that year, and this is my second on Mark. CPH needs to get a Concordia Commentary out before the next go-round!