I’m not sure you can trust a lot of Amazon’s reviews; I was shopping for a product the other day, and almost every single review was apparently written by the same Chinese person who wrote the product description and seller remarks. The missing articles throughout the sentence structures are always a dead giveaway: “You will love product! Very well make! I buy several. Give for gifts. Peoples very happy!”
You have to be more and more careful on Amazon, look at only verified reviews (drop down menu), sort by most recent because the default is by best review. Then look at when the reviews came in, all one day or in a 2 week span, as you noted are they repetitive or overly fulsome?
In the best situation the reviewers compare & contrast with similar items and you can check those out. Sometimes you learn of flaws or specific good points. Always with the grain of salt ready at hand.