Its ok, imo its bloated and takes forever to scan,usually 2 and half hours to 3 hours for a full scan. Where as Avast! scans in about 45 minutes to about an hour. As for detection I wouldn't know as I've never had it find anything so I don't know how effective it is.
I would rather use Comodo Cleaning Essentials even though I dont really like how I have to reboot to scan certain areas.