In this review, I assume that you watched "Log Horizon" so it may contain spoiler Pros - Tons of new characters - Art style improvement - More characters get their own spotlight on the story which emphasize the importance of their role - More characters growth - Spontaneous comedy that seems more natural - Opening song so epic they didn't bother to change it since season 1 - Good transition from ending scene to ending song- The atmosphere of the story is more tense and more philosophical with many challenging new problems

Cons
- There are many things left unexplained and no confirmation on season 3, but still enjoyable