Perhaps Witherington's best work, and one of the best commentaries on Acts to date.
There simply are no weaknesses in this commentary. It is well written and easy to read. It covers all of the issues you would expect, and more. It is up to date, engaging the most recent scholarship on Acts in an effective and informed manner. The organization is first rate and its special notes are consistently interesting and informative.
Witherington begins with over 100 pages of introduction that begins where most commentaries should--the issue of genre. Genre criticism is one of the underexplored areas of New Testament studies. Not so here. After exploring the prefaces in Luke and Acts, as well several categories of ancient historiography and examples of each, Witherington persuasively demonstrates that "Luke-Acts bears some strong resemblances to earlier Greek historiographic works in form and method of general arrangement of material, as well as some similarities to Hellenized Jewish historiography in content and genera apologetic aims." The introduction goes on to make a strong case for Lukan authorship and a date in the 70s or early 80s. Another feature of the introduction that is somewhat unusual is discussions of Acts and Pauline chronology. Though some may think this out of place, given the nature of Acts and its relationship with Paul's travels and letters, I enjoyed its content and placement.
The commentary on the text is excellent. Acts and Paul are Witherington's areas of speciality and it shows. He brings out the meaning of the text clearly and places it in its context. His analysis of ancient rhetoric -- something Witherington has pioneered in his commentaries -- is very helpful and delivers a better understanding of the intent of the author's text and purposes. Interspersed throughout the text are features titled, "A Closer Look." These sections delve deeper into issues raised by the main commentary, but are set apart and independently explored. I love them. They are topical, scholarly, and informative. I would have bought the commentary for these sections alone. The topics covered by "A Closer Look" are:
The Speeches in Acts
Luke's Use of the OT
Multiple Pentecosts
Salvation in Luke-Acts
Luke's Christology
The Summaries in Acts
Luke's Use of Sources in Acts
Lukan Eschatology
The Social Status and Level of the Early Christians
Miracles in Acts
Luke, Josephus, and Historical Reliability
The Hellenists
Synagogues?
Luke, Women, and Ministry
Gentile God-fearers--The Case of Cornelius
A Novel Approach to Acts
"The Way" and Other Religions: Competition and Conflict
The Paul of Acts and the Paul of the Letters
Of "We" Passages and Sea Passages
Altars to Unknown Gods
Claudius, Jews, and a Religio Licita
Miracles and Magic in Antiquity and Acts
"Paul's Departure"
The Pauline Perils: Travels and Travails in Antiquity
Paul and Lysias, Roman Citizens
Justice, Citizenship, and Appeals in the Provinces
Witherington concludes with two worthy Appendicies. The first examines reasons for dating Galatians as the earliest of Paul's letters. (Witherington is one of the leading proponents of this dating of Galatians). The second is an examination of Luke's view of salvation in its first century setting. Both are valuable additions to the commentary.
In short, no single commentary has ever added as much to my understanding of the New Testament book at issue as this one has for Acts. I highly recommend it.