As a kid, the two magazines always available in the house were Gramophone and Autocar. Gramophone concentrates on reviewing classical recordings, with some equipment reviews. When new recordings are compared with the finest prior recordings, you can easily read between the lines. They did not publish bad equipment reviews because they did not want to waste space on them!
I remember a series of tyre adverts in Autocar. According to the ads, this new wonder tyre had almost double the tyre life, better braking, better roadholding, better handling and it also reduced fuel consumption! Looked far too good to be true, but steel-belted radial tyres are now ubiquitous for cars. The claims were true!
I've discovered that products that do not change much, don't get reviewed much. Get a product right first-time and you will hear about it once in reviews, unless it turns up as a classic in retrospectives.