The source ratings (for sources that have been discussed substantially) are on https://en.wikipedia.org/wiki/Wikipedia:Reliable_sources/Per...
> Al Jazeera's live blogs should be treated with caution, per the policy on news blogs.
The live blog warning is mostly ignored in practice, even though it reflects a broader policy (WP:NEWSBLOG). Al Jazeera's live blog alone is probably used more than any other source in the topic area.
If you actually edit in this topic area, you should know that its bias comes up all the time. Almost every talk page on I/P is littered with endless debate over whether Al Jazeera covered this or that accurately.
- An occasional newcomer tries to raise concerns, before being informed that it's pointless because Al Jazeera has been deemed reliable.
- Occasionally other reliable sources contradict Al Jazeera.
Both are quite rare compared to the vast number of Al Jazeera references.