If you're not going to tell me that "actually, this isn't very good", aren't you doing me a disservice?
no, because that criticism has to be qualified, why is it not good etc.
what the potential customer needs to know is info, what does the recording consist of, what instruments are used, what kind of folk music is it, criticism such as such and such is out of tune is fine,    but what we do not need to know and this frequently happens, is what the reviewers particular taste is, comments such as this would make a good flowerpot holder,or previous recordings by this singer I found o pretentious.
the above is the sort of poor reviewing musicians have to sometimes put up with.
the reviewer should tell us about the recording, not previous recordings, constructive criticism[if necessary] along with praise is good balanced reviewing, plus indications of style and instrumentation is all that is required