I think it’s a useful site for getting a general sense of partisan bias. The moderators evaluate at least five articles from each site as part of the rating. Additionally, they crowd-source votes on bias, which can skew the results depending on who the site happens to attract. At the moment, their ratings show CNN to be just as far left as MSNBC, and I don’t think that’s quite right. Another useful site is allsides.com. They also allow people to vote, but they ask the voter to rate their own bias as well. A nice thing about Media Bias Fact Check is that they have tried to rate hundreds of sites–I think they are over 1000 now, so that obviously includes very obscure ones. It’s quite a bit of work, and overall I think that it’s a great resource.
I am trying to provide an extra dimension of rating with the quality axis. Most media evaluation right now is limited to left-right bias ratings and “fact-checking.” However, as you know, there is much more to quality than just fact checking. Stay tuned–I’m trying to fill that void.