It's pretty straightforward as to it's use. Their camera database linked above shows an orange box with an R for any camera they've done a review on. They also have an alphabetical list by manufacturer on a separate page.
Yet another site for in-depth reviews.
Yet another site for in-depth reviews.
They also offer camera reviews. I find this page helpful when I want to easily compare particular features of 2 or 3 cameras side by side.
Each of the above sites have particular strengths & some may like the approach of one over the other. They all offer a wealth of information & opinions. Have fun browsing & good luck selecting just the right camera for your needs.