I found this to be a useful but uneven commentary.
The author comes from a reformed Protestant tradition; he upholds both the historicity of Israel's enslavement to and exodus from Egypt. He also defends the traditional view the book was written solely by Moses. He occasionally engages with the works of other commentators who teach the book was the product of 3-4 authors living at different times, but this is usually done only in the chapter end notes.
The book is primarily a study commentary. It highlighted several things for me that I had never thought about when reading Exodus, including:
○ Interesting parallels between the story of Exodus and the beginning of Jesus' career
○ Why Moses failed the first time he approached Pharaoh
○ Insight into the Golden Calf as the first national sin of Israel
Unfortunately, Motyer has some annoying habits common to many commentaters:
○ Overly fond of chiastic outlines
○ Overly fond of quoting old hymns
○ Sometimes stretches the text to make points that, while valid, might not be supported by or naturally derived from the passage
To illustrate this last item. Motyer's translation of Verse 2:23 says "The Israelites moaned in their slavery and shrieked, and their call for help because of their slavery went up to God." He spends a few pages on the importance of prayer. He maintains that "moaning" and "shrieking" are natural human responses but they do not mobilize God. Only when it reaches the level of prayer ("call for help") does God respond. This seemed like a sketchy argument to me. First, in most translations, "shrieking" is replaced by "crying" and this is the cry (or call) God responds to. Second, this line of reasoning implies that during 300 years of oppression, the Israelites had not been already continuously prayed for deliverance. If only they had prayed sooner…
I was disappointed in his treatment of the plagues. The most interesting method is to analyze each one as an assault by the true God against one of the Egypt's mythological deities. Motyer mentions a couple of these in end notes but does not dwell on the point. Furthermore, he completely passes over the apparent contradictions in the text between the plagues of livestock and hail (in the former, all the cattle are killed by disease, but in the latter Egyptians are warned to protect their cattle from the hail.)
His treatment of Passover is very insightful, especially his observation: "When Yahweh entered Egypt as absolute Lord and Judge, Israel's problem was no longer how to escape Pharaoh but how to be safe before such a God… The real issue is that unprotected, unsheltered humanity cannot stand in the presence of the Lord the Judge."
Motyer's chapter on the Ten Commandments was also noteworthy, particularly his observation on covetousness: "The tenth commandment is where the Decalogue ends, but it is, in fact, the point at which every other breach of the law begins."