Reviews are generally somewhat biased, even by the well knows publications. Generally I rely more on the opinions of people who work day in and day out with computers. There are certainly a number of worthy AV programs out there - I personally do not consider Norton's to be one of them.
From observing many posts here on PRO, I would say that Norton's is listed as a problem cause much more often than as a recommended program. On the other side, I have heard very little negative comments about NOD32, and I run it on a couple of my machines and love it.
While virus detection rates are certainly the top priority when choosing a product to safegaurd your computer, a program which uses a lot of resources, and causes conflicts with many common software products is definitely something to consider staying away from *cough* Norton's*cough*
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