Speaking of the duration, I think that this would be the only negative point that I find, but at the same time it is a good thing; It's quite... "Exciting" would be the word? "Beautiful" maybe? It does not matter, it is understood; fast forwarding is a good thing too.
The new characters (The Sleeping Knights) are nice but none of them are anything that says "Wow, this character is one of my favorites, I love it" although the leader of these and co-star of the series is quite nice.
And speaking of protagonists, let's move on to the best of the manga in my opinion. The protagonist, Asuna Yuuki. Co-star or background character in previous arcs, but now the protagonist, taking over the world of SAO not for SAO, not for ALO, not GGO or any other game, but for real life and the problems in it , like the problem with her mother and with herself (Although of course, they also spend a good time in ALO).
Possibly my favorite SAO arc since there is no bad guy to defeat, there are just "obstacles", "problems" or just "circumstances" to overcome... Or just accept.
Short but powerful.
