I recommend this book, for a number of reasons.
1. It isn't dense. (Which surprised me since Leviticus itself is, well, pretty dense.) There is a very informative introduction that focuses on the book's structure, sources, authorship and date, the Hebrew text of the book and more. Since I feel that Leviticus is often written off as irrelevant, I appreciated the section on "Leviticus and the Christian," because I think the book is in the Bible for a reason. The body of the commentary, past the introduction, isn't dense either, although there is a lot of information to take in. I took it slowly, for that reason.
2. The author's focus in the commentary is on understanding the meanings of the Hebrew words in Leviticus and thus understanding what was being prescribed/commanded/performed. While each section ends with a brief discussion of "x (e.g. Leviticus 26) and the NT"--which often deals with instances where the NT quotes Leviticus--the author steers away from the issue of whether or not these laws should still be followed by Christians today. His issue isn't proving one side or another, but interpreting the text in its context. (This issue is something I've been interested in recently and I've read a lot of arguments on both sides. It was refreshing to read something more balanced.)
3. The organization of the book allows for easy retrieval of specific information. Leviticus is first divided into larger chunks (e.g. the first 7 chapters cover "Laws on Sacrifice"), and then each chapter within each chunk is treated separately. First the chapter is quoted in its entirety, then there is a verse-by-verse discussion of it, with clear headers that tell the verses being discussed and their topic (verses are usually grouped into 3s or 4s). If I wanted information about exactly how the peace offering was supposed to be offered, it would be easy to go back and find.
4. Related to the above point about how easy it is to find information, there are 4 indexes in the back: (1) Index of Chief Subjects, (2) Index of Authors, (3) Index of Scripture References and (4) Index of Nonbiblical Texts.
5. Based on indexes 2 and 4 above, this commentary seems to be well-researched. The author notes many different interpretations for the same things, and states clearly which he finds more reasonable. (But does not necessarily discount other arguments.) The studies that he cites are all footnoted, so it would be easy to look up exactly what the author is drawing on.
In short, I really like this commentary. I may look into other commentaries in this series. I read this one cover-to-cover over a couple of months. (I had to re-check it out of the library a few times.) It took so long partially because I didn't want to overload on info, but also because I was only doing a chapter or so a day in the morning, and also reading a second commentary at the same time.