When reading a review I always read between the lines. This is why. I have done a lot of shows where one artist on my right does exceptionally well, while the artist on my left makes nothing. What I make from this is that the show is a good for for the person on my right, but not the right show for the person on my left.
You have to know who your audience is. Who your buyer is. A good show for a potter is not necessarily a good show for a painter and visa - versa. I look for shows where the price points could be like mine and the people coming to that show might be interested in what I am selling. Some times I get it right and sometimes not. If I cannot go to the show I look up the artists who attended. This only works some of the time.
Good reviewers should include what they make and price points that sold best. They should include a little observation about neighbors who did well or not. I read every review with a grain and am always interested in how easy or difficult a set up was etc.
What else should a good review include?