If you decide to keep Norton, consider shopping around when the free trial nears the expiry date. There are reputable places other than the Norton site that sell versions of Norton at a lower price. There's no need uninstall the expiring version when buying a copy of Norton from elsewhere. Just select the 'I have a key or code to enter
' option that comes up during the renewal procedure. Use the key that comes with the bought CD.
As regards reviews, read any you can find. They all differ a bit. Here's another site where comparisons can be made: AV-TEST - The Independent IT-Security Institute: Test Reports
Click on the 'Test report' numbers for greater detail about any tested program.