On this episode, Kirito saves Sinon from Death Gun. Later, they both tell each other about their backgrounds and details.
So I pretty much wonder whether Kirito is cheating on Asuna or not but then again Sinon is obviously part of his harem. Anyway, the action was pretty good. Also seeing Kirito and Sinon explaining more about themselves was nice. Now will they be facing off with Death Gun on the next episode? Overall, cool action and explanations.
Conclusion: Cool action and explanations.