About the GUI (free version), it shows LOTS of totally irrelevant information. The only useful panel is the one showing scans and related options.
I know it sounds harsh but among the poll options I voted "rubbish". I don't blame the guy who designed Avast 8 but wrong priorities.
About Avast 8 itself, installed on a brand new system, tried, met some annoying bugs, like Mail Shield not dealing with SSL connections then GMail dead unless I switched the Mail Shield off, made some search and effort to fix it without success, got the usual feeling about all those "modules" doing who knows what and why and not being confident I finally uninstalled. I like the low hardware requirements of Avast but at any given upgrade there is always one thing or another that doesn't work. At least for me.