Sword Art was a pretty decent anime. The problem is that it kind of became the one direction or justin bieber of the anime world, at least by 2013. You either love it or you hate it. It kind of introduced a lot of characters that you don't get to know much about and it left you hanging. For all i know, I'm probably just stupid, but I still haven't figured out why Kagame made SAO in the first place.
SAO was good but it took a major, major dive into the abyss of a mario-princess peach scenario at around episode 14. On the bright side, the anime kept me on edge.
I know a lot of my fanboy friends really loved the anime, especially the ones that like mushy shojo. And I also know they got pretty upset (I mean completely raged) during the end of the second season. The end seemed cliche though.