This site is helpful, but this site does look a little biased towards the left. It seems that they are rating left and left-center sites more favorably than right and right-center sites. For example, using their filtered search, there are a few left-center sources that are rated very high in factual reporting, but no right-center sources seem to hit the very high mark (Proof: https://mediabiasfactcheck.com/filtered-search/?bias=Left-Center&factual_reporting=very_high AND https://mediabiasfactcheck.com/filtered-search/?bias=Right-Center&factual_reporting=very_high).

In addition, there also seems to be FAR more LEFT sources being rated as high in factual reporting than RIGHT sources (Proof: https://mediabiasfactcheck.com/filtered-search/?bias=Left&factual_reporting=high AND https://mediabiasfactcheck.com/filtered-search/?bias=Right&factual_reporting=high).

Even if this is just how the internet is with left-leaning sources generally being more reliable than right-leaning sources and/or the right spewing out more bs than the left, this POSSIBLE bias is still there.

--- Rant incoming (oversimplified summary: this page got raided with ultraconservative 1-star reviews) ---
About the concerning number of negative reviews and how highly voted they've been, it looks more like some conservative raid than genuinely valid reviews that should be taken into consideration since a lot of the negative reviews have a questionable validity at best. Most of the accounts posting these negative reviews only have 1 review, indicating that this is the work of either one person using many alts to bring down MBFC's rating, or an angry mob who created sitejabber accounts for the sole purpose of giving MBFC 1-star reviews.

I did check the profiles of some of the reviewers with many reviews, and one of them (not saying the name) has a very clear history of poorly rating pro-science sources (that I assumed told them to wear a mask) and other credible Left-Center bias sources. They even gave the CDC a 1-star rating (I didn't mistype anything I literally mean the literal CENTER FOR DISEASE CONTROL) all because the CDC told them to wear a mask, which if you ask me is a BIG AND BRIGHT red flag.

Not to mention this site has a very low amount of reviews to the point where any ultraconservative Facebook friend group could easily overwhelm the little positive reviews there are in the first place and bring MBFC's rating down to the trenches. I did hear that reviews on sitejabber that failed to criticize the website got deleted and only the ones that criticize or straight-up slander the site get accepted, but correct me if I just heard a conspiracy theory (for now I think it is).
--- End of rant ---

I know that sites like these gotta make money one way or another, but some features are locked behind a paywall, like journalist bias and credibility ratings, which is pretty disappointing. That's the only real negative I have to say here.

TLDR: This site is pretty reliable, but note that left-leaning sources are generally voted more positively in terms of factual reporting here than right-leaning sources, which could either be due to a slight left bias or this just being the way the internet is. The reason that this site is rated so poorly is because a bunch of ultraconservatives have raided this page with 1-star reviews. The poor reviews all have questionable validity and the reviewers who made these reviews have a questionable history of not having any other reviews or having many other questionable far-right-biased reviews on pro-science and credible left-center sources.

And as always folks, use this site as a guide and not a gospel of truth.

Gave this a 5 star review since it's the most I can do to help combat the ultraconservative raid that happened here.

BTW Sitejabber, this isn't in any way a shopping site so I don't need proof of purchase.