Maybe I don't know how to rate specials, but whatever.
This was very delightful to watch. With it all totaling up to just a mere 7 minutes, you'll end up wishing there was more.
These specials were delightful to watch and provided for some laughs at just how ridiculous it was. I found this more enjoyable than something like Sword Art Offline (which just gave you a bunch of useless information with boring character interaction).
When I finished the main series I was a bit worried to see how this would be, but it was a delight. I'm happy to have seen this.