I don’t read five star reviews ever anymore. If I want to find a believable endorsement of a product, I’ll look for a four-star review that contains a criticism that isn’t that bothersome to me personally, but legitimate enough that I can imagine a customer who would be deterred by it.
We moved a year ago, and I found my favorite pizza guy, Tony, by maybe the most convincing online review I’ve ever read. The most recent review on google maps was a one-star that was basically like “I met Tony and he casually used foul language etc etc there is no need for profanity etc pizza was some of the best I’ve ever had though”