There is a danger to those, unless you already know a lot about the product. Obvious examples are, "phone broke when I dropped it down a flight of concrete stairs" or "burned my finger when I tried to get a stuck bagel out of the toaster". Less obvious are the ones like "parts were missing when it arrived" (threw away the plastic bag with the screws)", or "phone will not boot" (phone arrived with a dead battery and person did not charge it).

I wish there was a way to sort reviews by how long people had owned and used the product. So, I can get the views of the person who has lived with it for a month or a year, not the person who bought it yesterday, or the person who bought it and immediately returned it.

I also wish that Amazon specifically would not allow sellers to change what product is being sold, but keep all the reviews. Sometimes, you can go back and find reviews that are clearly for a different product (like "length and color exactly as promised" for something that would not matter for, or complaints about cellular reception on a device that has no cell connection).