I had the Security Suite used until a few days of AVAST and am (AVAST submerged there by the way is no longer on) due to the current test reviews come to Bitdefender and have to say I am thrilled. The detection rate can be as an end user of course not really check yourself and therefore must pay the test faith. But the speed is yoy. AVAST have significantly improved: The boot of Win 7/64 is as fast as initially without antivirus software and while working you can tell him as well as not.
The only problem I had after installation (the original German version of the manufacturer and not from CD web page!): I still use desktop widgets and who had suddenly disappeared. After much research on the net and in the registry has been found that Bitdefender had the UAC perched on maximum. One step lower running again everything (for those who have the same problem / had) :-)