Honestly, the way I see it.....the majority of anti virus programmes are probably okay but as the saying goes "one mans meat is another mans poison"....we can only go on personal experiences.
I was genuinely shocked to see one poster reporting negative experiences with NOD32....no big deal you can say and rightly so.....but I know of one or two 'official entities' who have used it successfully and continue to do so.
just as well we all have choices I reckon