I have used this set fairly extensively, and have found it to be very helpful. There are three weaknesses in the set that probably should not be overlooked. First, some of the earlier volumes are now a little bit dated. Second, the limited interaction with other scholars sometimes gives the impression that the comments presented here are the ONLY valid interpretation (this weakness is less evident in Kistemaker's volumes than in Hendriksen's). Third, those with a Calvinist, Reformed bent, will likely be more impressed than those of us from other parts of Christendom. That being said, these commentaries are still very good. I have especially enjoyed the volumes on the Gospel of John and on Peter and Jude.
This is a great set to get. What makes it so great is the fact that it is a hybrid set. It is both exegetical and practical, not too technical and not too devotional. Perfect for the busy Pastor and for preparing bible studies. I have used this set for the past 3years and always refer to it when preparing a sharing or for my own devotions.
It is written from a reformed perspective and therefore interprets scripture from a covenant theology perspective. However, even though one is dispensational (like myself), you will profit greatly from this set!