> however, i find the reviews still useful, if you only look at all negative ones.
this used to be enough for me too. You do have to have to sift through a lot of useless complaining, but it was worth it to find something that you know would drive you crazy or wasn't compatible with what you had in mind. Unfortunately, Amazon managed to screw that up to by slapping the same reviews on very different products.
If I'm looking at what seems to be a nice pair of headphones to wear while cleaning around the house but don't buy them because multiple people say they slip off your head easily when looking down I could easily find a friend who has those same pair without that problem because they fixed that issue with the current model.
You have the same problem with positive reviews. A good feature (reliability, quality materials, etc) may not be true when it arrives. At first I thought it was just because I was getting very accurate knock off products (which can happen) but it turns out amazon is just a terrible online store. It leads to a lot of conflicting product reviews like "this is the only product I've found that lasted for more than 6 months and I love the metal accents!" right next to "This is 100% plastic and broke after 3 months of light use. Waste of money"