I'm going to start this off by clearly stating that I've been a fan of the Isekai genre since before it was a genre. I've seen the formulae a thousand times, so that being said.
This one is fun. It's a pretty standard Video Game incident. MC is trying to figure out what happened, but thats like an after thought to the 'holy crap I'm in my favorite video game for real" theme. Which, is fun. It takes different things seriously through the relationships of the characters as well as a few standard troupe responses/situations.
So, I say watch it for the "Ha!.. what a jack-ass/genius." moments to the usual scenarios. They're worth it.