These are my tips that I rely on when reading reviews.
1. How many reviews has the reviewer contributed?
Reviews written by someone with a limited or minimal number of postings are suspect whether they are positive or negative. If the review is glowing and the the commenter has a limited number of contributions, I am concerned that the hotel is either directly posting or incentivizing people to post raving reviews to overcome warranted critical comments. One Hamptons property that I thought was mediocre had terrific reviews. When I went back to look at the reviews, it appeared that the the harsh reviews were from people with many postings while the glowing comments were from with reviewers who had only posted once or minimally.