This article is from the Progressive Music FAQ, by Phil Kime(Philip@kime.org.uk) with numerous contributions by others.
Post it. Negative reviews are a positive thing. Not all progressive
music is as good as the rest or even good at all. It is important
to differentiate between the excellent, good, mediocre, and poor,
especially since the average cost of a CD is $15-$20 (US) or £12-£20
(UK). While not everyone will agree with your point of view, if you
present your arguments in a non-inflammatory manner, most people will
respect you for it. The deification of some progressive artists
brings a lack of perspective that in turn hurts the fans more than
helps them. By writing a negative review, even on a progressive
"sacred cow", you may make both new and experienced listeners alike
re-assess their viewpoints, which is always good. But, of course,
this does not mean you should always write negative reviews. Be fair,
but firm.
 
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