This work must stand alongside that of the three volume work of W. D. Davies and Dale Allison in the International Critical Commentary as one of the best works on the first Gospel around. Keener's work is similiar in size and scope to that of another Evangelical scholar Robert Gundry, who published a commentary on Matthew a number of years back. However, Keener is more conservative than Gundry in many respects, especially on the historicity of Matthew. And, unlike Gundry, he brings an amazing amount of knowledge about the milieu and literature of the first century to bear upon this work in helping his readers to understand and appreciate this gospel - especially its literary and theological dimensions, and the social worlds that are presupposed and reflected in its story. Added to this are numerous excursions and notes on many themes interspersed throughout, providing more detail of a point made or defense of a position adopted. At times Keener has a penchant for being idiosyncratic and unusual in his views (although he argues them all very well). Holding views, in other words, that are neither characteristic of liberal or conservative commentators (of course, without people challenging the commonly held views on either side of the divide, scholarship would never progress!) So, if you want a detailed commentary that does not merely repeat what others have said, but makes an original and (often) compelling contribution to Matthean studies, this commentary is definitely a work that you will want to consult in my view. In terms of its relation to other works: it is not a popular level exposition (like his small volume in the IVP New Testament Commentary series), nor is it a work leaving no stone unturned, of use only to the trained student or scholar (like the ICC volumes mentioned above ), but it is a work that will serve the needs of readers and students alike, looking for detail but not looking to be overwhelmed by it. In this respect alone, it makes up for a glaring need on Matthew in a flooded commeantary market. As a primary commentary, it constitutes an ideal investment for the person looking for balanced, detailed, thought-provoking exegesis.