First off I am extremely biased for this review and my score affects it. I have played almost every MMO in existence.
With that being said, this anime is amazing. I never thought an anime about an MMO would be any good... I mean who would want to watch what I could just play........ Well SAO proved me wrong (the first half of the show) and it led me to watch this show. There are also a lot of unexpected twists...
I can tell this series is going to go on for a long time and I can forsee a really good story from it too. It reminds me a lot of fullmetal alchemist in the sense where the story is ongoing, but it actually isn't just going in circles. It actually slowly progresses..
If you ever were a fan of any type of MMO, RPG, or something along the lines of that you have got to check this show out. It's getting a 10 in my book.