Ok, this post is typed with all due respect for Avast AV, and its creators! My wife and I recently both un-installed Norton AV from our PC's. The reason was, because of recent Symantec issues, and our subscriptions were up soon. She installed AVG free on her system, and I installed Avast home edition on mine. We have both been using these AV's for about two weeks now. AVG seems to work well on her system, and does what she wants. I however find that Avast is far more configurable, both in its look, and in its scanning process. I like the fact that it has verbal announcements, different skins, scans fairly fast, and just looks good on my system!

However, there are two things that I dislike about Avast. One thing I already mentioned here in another thread on the forum. My shutdown time has increased after installing Avast. And of course my re-boot time also suffers. Not that big of a deal, but AVG does not produce this issue. Maybe Avasts resident scanner is more complex than AVG's, and more time is required to shut it down, I really don't know. I even terminated the resident scanner before shutting down, and it still took awhile. The second thing that I have noticed with Avast installed, is that my hard drive occasionally chugs away during the time I am using my PC. This will happen while I am sitting idle reading a web page, and not even navagating with my system. I use imaging software, so to test this issue, I imaged back to before I installed Avast. The hard drive churning vanaished. Again, this issue is not present with AVG.
Anyway, those are my two beefs with Avast, but other than that, I would go so far as to say that Avast blows AVG out of the water on all other aspects of the software. I even like it alot better than Norton AV. I would consider buying the pay version of Avast, if only to get the script blocker. My only concerns, are the two items I mentioned above.
Douglas