Critical analysis is a very different skill to writing. But really, a good review, IMO, is not the same thing at all. A good review is about telling the reader why they should or should not read the story in the opinion of the review writer.
I honestly find my feelings a better guide in review writing than any kind of logical dissection of the author's skills.
Let's be honest, the world's greatest technical writer can still turn out a boring story, where a person with far less technical skill but far more imagination may turn out a story you can't put down...
