It all depends on the reviewers and whether you have any trust in them. Sometimes if there are multiple reviews of the same product you are interested in, the reviews can be helpful.
For instance, if every review says the product sounds bright, or the bass is flabby, or the soundstage is as big as a postage stamp, you may want to think twice before getting your checkbook out.
The flip side is if all the reviews point to important strengths that you personally value. Those components would be worthy of further investigation.