Understanding the rate and nature of bad reviews provides much better signal than high-star reviews. You will get a lot of garbage in 1-star reviews but I find

Understanding the rate and nature of bad reviews provides much better signal than high-star reviews. You will get a lot of garbage in 1-star reviews but I find you also find information about expected uses of the product that don't work, or other types of important feedback (for example, I was looking for a "bluetooth splitter" a while back and lots of 5-star reviews said that the product worked as advertise, but some percentage of 1-star reviews stated that several of the products added a few hundred milliseconds of latency to the audio). I also use the percentage of low-star reviews between similar frequently reviewed items (for example, coffee makers with hundreds of reviews each) to approximate design defects, manufacturing defect rate and/or ease of use issues.