reviews are good to find out details on a product you might be considering. I find Manufacturers websites lacking in useful information generally.
I take reviews with a big grain of salt other than that. I've seen rviewers writing about a product that is clearly beyond the reviewers system he is using. I know some reviewers who write for those online audio pages who I don't feel are qualified, lack of experience. You have to handle some gear, have it pass through your system, go to some shows, be in the business or other experience, just because you own a system and maybe have upgraded don't make you a reviewer.
And, don't get me started on these YouTube guys, most have an agenda and cater to a certain crowd, most don't care if what they say is true or who they slander.
I've actually gotten burned by trusting a reviewer. I used to think the long time well known reviewers might be credible. I read a Stereophile review where the writer says he couldn't tell any difference between these two products in performance, one was more expensive. I had a chance to get the cheaper product on a deal but no way to audition, I knew better but did it anyway. I did not like the sound of the product, I sold it. I auditioned the more expensive product and placed the order that day with the dealer who brought it over. I don't want to think the reviewer would lie but the two products he said sounds ded the same clearly did not. In fact, the difference in price was well worth it.
And, sometimes the more you findout about the reviewers you know whether you would consider them or not. There's a welll knone reviewer who I saw on FB post things I don't agree with and wouldn't even bother reding anything else by him, from his comments I just do not have confidence in the person's judgment on audio.