I personally found it to be an amazing anime, despite reviews from others When I watched the first SAO (not GGO) I watched it in dub, and since then I've noticed that Kirito's voice corresponds to other dubbed characters. So now everytime I hear a dubbed voice that's the same as Kirito's, I can...
If it has a nice dub, like Ouran High School Host Club, then dubbed it nice. But, for something like Black Butler and Tokyo Ghoul, I prefer subbed all the way!