The Leveller said ".....folk music, ...ranges from the very traditional to the outrageously avant garde. It takes a very broad mind to do justice to both extremes."

The sort of review I would find helpful would tell me where the recording was in that spectrum. It might also say whether the reviewer liked 'that kind of thing' and considered it good or bad of it's kind. To say that a style is 'not my taste' is not being negative. If they play out of tune then negative is good.