Below is a list of every treadmill review website I could find. You will see a link to the website, a rating, a brief description and a list of brands they review. After the brands is a link you can follow for the full audit of that website.
Overview: The most recognized and respected name in treadmill reviews. More reviews and ratings than anyone. Reviews aren’t super detailed but say enough. No affiliate links and never has been so definitely the most trustworthy reviews out there.