According to http://www.avast.com/internet-security , avast is having 50% discount for their Internet Security suite. However, is it good? anybody used before? I am using trial version. So far found no problem. But, I would like to see your comments. Should I choose this product?

I've used it until it expired i just switched to Free version.. Since windows firewall on windows 7 is good enough and I don't need the manual sandboxing feature.