Ignore the absolutely glowing review. Might be an owner or employee.
Ignore the absolutely worst review. Some people can never be pleased.
Take note of how many reviews the poster has submitted. The more the more reliable. Check some of their other reviews to see if they are consistent & spell out what they liked or disliked.
Take a very old review with some suspicion. Things may have changed, for good or bad, over the years since somebody last posted.
Over all RVPR is very reliable but it is only as good as the people who take time to post.