This has been a very helpful study tool (I teach a Sunday School class and a home Bible study). I feel more confident when presenting material that could be interpreted in more than one way. However, the print in these volumes is very disappointing - it is very blurry. Also, I might question the author's interpretation of some of the passages. When reading the original Hebrew or Greek, sometimes it seems that his version could be better stated. But since I don't want to tackle these languages myself, I'll take his word for it. I'm glad to have these volumes in my library.