Eset smart security

Hello,
please tell me if eset smart security 4 is good . i want use a good antivirus or whatever it may be. i used avg, avast, avira, bitdefender, webroot, vipre, mcafee, kaspersky etc. but some slows down my pc and some does not find any virus and some does not have good virus database . now i am using eset smart security 4. Please tell me if its good or any antivirus that you prefer.