Norton internet security 2012 vs 2013

Hi! My current antivirus is norton internet security 2012. I am still uncertain whether I should upgrade it to 2013 or not. I have read reviews saying that those who tried upgrading to 2013 were forced to revert it back to 2012 because of some updating problems. Can you please help me on my decision? Is it a good step for me to upgrade or should I just stick to the 2012 version?
