I've worked through the first twenty or so chapters of this commentary alongside those of Zimmerli (Hermeneia series) and Leslie Allen (WBC series).
In my opinion, Block's commentary does not match up well with either commentator. He consistently reads the text synchronically, displaying no awareness of how the book was updated over time to make it relevant for new audiences.
For example, in his discussion of chapter 3, Block fails to account for the inconsistency in vv. 16-21 when compared to v. 27. In the former, the people seem to have an opportunity to repent, while in verse 27 Ezekiel's preexilic message is seen to be one of judgment.
This seeming inconsistency is best explained by arguing that Ez. 3:16-21 is an insertion of a later message of Ezekiel's that updates the book.
In other words, the promised judgment has come, and a new message-- the one that characterizes chapters 33ff.-- is now given to the people. This new message of one of hope, but in this hope the people need to remember that God's former message of judgment is still relevant, in so far as his expectations are the same.
This may seem like a minor point, but the view one takes on this strongly influences the interpretation and application of the book.
The other problem I have with Bock's commentary is that when given the choice of two interpretive possibilities, he often seems to take the wrong one. I consistently found Allen to be the more convincing interpreter.
The greatest strength of Bock's commentary is the section on theological reflections with which he concludes each section. It is for this alone that I have kept his commentaries, after going back and forth several times on whether or not to keep them.
However, Allen also displays theological sensitivity throughout, and if I were to preach through the book I believe Allen's commentary would generally be adequate.
Zimmerli's 2 volume commentary set was an instant classic in the field, and is worth owning. He, too, displays theological sensitivity. The main drawback of his work is that he tends to consider later redactional activity, like the example above, to be unimportant and delete it as unnecessary.
In order, I would buy Allen, Zimmerli, Block, Hals (Forms of Old Testament Literature series), Greenberg (Anchor Bible Commentary), and Blenkinsopp (Interpretation).