Ok, I know we're all quite sick of the "which AV/Firewall/whatever is better?" questions, so this one is very specific. I've noticed Avast! antivirus has yet to be discussed much among the other big name AVs we've mentioned on other threads (including the countless "Which AV is better?" threads).

So, how does Avast! antivirus specifically compare to the other free AVs out there? For instance, Avast! vs. AVG, etc. Reason I'm asking is that I use Avast! ever since I could no longer afford paying for Symantec stuff, and I've been very happy with it, especially it's automated live update feature. But I don't yet have any experience with AVG or the other free AVs that I've heard quite a bit of praise on.

Anyway, please keep responses focused on simply Avast! compared to other free AVs, so we don't drive the seniors nuts.