Hey, I've been using this for nearly a decade. I think for detection/protection this is top five, and when you also look at effect on system performance and updates that brick the computer, this one rises to the top.
This is a great antivirus package probably one of the best on the market, It's lightweight, sleek and simple. Detection ratios are very good. I've tried various security suites over the years , Norton in early 00's, Kaspersky, Avira , Avast, AVG, list goes on. ESET is far ahead of it's competitors, reason why ? Because it does what it says on the tin, ESET unlike other company's don't bundle tons of unless tools in with there software or slow your system. It's a very clean and professional, the scanner is very fast. Viruses they haven't got a chance. It will even pick up ad-ware (if you ask it to) which i was surprised to see installed on my system.