I think most people who write a review tend to say whether they recommend it to others or not, and as part of the review list its merits and flaws, as well as describe the waulity of the art, layout, page count, binding etc...
As such its probably okay just to go on the review itself, as different people tend to look for different things in a product so will likely scan numerous reviews of the same thing for different perspectives in order to guage whether or not its what they want (I know I do).