I honestly can't rate it reliable... I was directed to snopes for the very first time when I was conducting research on the credibility of a certain local enterprise. The info labelled as "fact" by snopes looked like it came directly from the public relations department of the company in question, and the "facts" provided I KNOW FOR A FACT are false. This is based on my personal experience.
So snopes does have a bias towards certain entities. Therefore I have to take the rest of their "facts" at face value.