I was preparing for a Bible Study on Genesis and wanted a Jewish perspective on the book to see how much difference there was between Jewish and Christian views of the book. I found this commentary to be useful in filling that role to a point, but I also felt that there was far more overlap than there was difference.
Sarna's commentary is a solid work that I appreciated quite a bit. The structure of the commentary is a little different, with many notes with comments rather than paragraphs of discussion broken up by sections. I found this useful in some ways as it allowed for the focus to be on points of interest and easy to find rather than within some larger discussion. On the negative side this also made things feel a bit more disjointed than other commentaries I used.
I was also hoping that there would be more interaction with rabbinic teachings on the text. There was some and I enjoyed getting those bits of insight, even when I didn't necessarily agree with them, but I found myself wanting a bit more of that.
I also felt that the commentary was good at pointing out certain wordplays within the text and how certain words in proximity to each other were similar sounding in the Hebrew or based on the same root or whatever. While other commentaries would point this out sometimes, I felt like this one did it frequently. While not going to change how many read or interpret the text, I think it shows the artistic structure of the Bible and how there is a literary sophistication to the text itself.
Overall, I enjoyed this commentary. It maybe wasn't fully what I was expecting, but I thought it was a good resource to have while preparing to go through the various chapters of Genesis.