A really long clip episode with a standalone Alfheim adventure tacked on to the end, framed by mild fan-service, with a “surprise” announcement of season 2 at the end. Not bad, but not worth 100 minutes of my time; fortunately, I could leave it running in a window while working, and look over when something happened.
I have no intention of watching the second season, however. Gun Gale Online is pretty much a Kirito solo adventure with a new girl, leaving Asuna and the rest of the gang as spectators in the real world. The (still-unfinished after N volumes) Alicization arc that follows that is even more so, although apparently Asuna gets to do one small thing each book.