I've decided and tried to remember that you pretty much can't trust ANY online reviews of ANYTHING. The dream of the internet is over.
https://www.recode.net/2018/3/18/16581030/mattress-reviews-n...
https://www.recode.net/2018/3/18/16581030/mattress-reviews-n...
I'm sure people have written a lot on this. I think some of it is because most people actually _are_ interested in treating each other respectfully, and the internet was smaller, with less opportunities for making money (at one point enforced anti-commercial in fact), and more homogenous (for better or worse).