Too right Al Jazeera doesn't have a pro-Western bias; it is at the completely opposite end of the spectrum.
I don't have the benefit of seeing the channel bar the excerpts shown in the UK, but all I have seen from them so far in this conflict are propaganda messages: civilian casualties and captured (or worse, murdered) coalition forces and kit.
They showed video of a downed Apache yesterday as news - but it looked a lot like the one that was lost and then destroyed on Monday, which perhaps they didn't mention?
I'm not affiliated with the BBC, but am uncomfortable with their link with Al Jazeera, which is nothing more than a mouthpiece for OBL, IMHO.