I'm still fairly new to anime, and from everything I've gathered this might be a bit of controversial one. What I mean by that is that at time of writing and the current state of SAO I think that this spinoff is better than the main show.
*Ducks the slings and arrows*
A twelve episode spinoff from one of the major anime franchises this is another story within Gun Gale Online and features none of the main shows characters.
This was no doubt a gamble, with little to tie it to SOA other than the setting it could have fell flat and from everything I've heard from the anime community many think it did.
I however really enjoyed it, a short single story spread across a dozen episodes really worked. It tells the story of a girl who ventures into the online game and becomes a whirlwind sensation with her abnormally tiny and overwhelming cute avatar.
The story is oddly dark in places but softened up with cutesy visuals and Lenns sickly sweet voice. The action is excellent and frequent and it's very well paced which is something you certainly can't say about SAO!
I really enjoyed this and would love to see Lenn and co back. A rollercoaster ride, an emotional story, great characters and a really nice surprise of a show.
The Good:
Action packed
Well scripted
A lot of fun
Great story
The Bad:
Nothing springs to mind