The visitor arc of Irregular at magic high school is quite alright. It's a sequel so you shouldn't watch it without watching the original anime but if you enjoyed the original you'll like this one as well. The story is relatively interesting and there is more of a singular storyline than last season. The characters are the same as in the previous season with a few new additions and the artsyle is similar enough as well. The sound is worse than in season one so that's suboptimal. Overall you'll probably like the anime if you liked the first season and if you didn't like the firstseason you won't like this one either. If you haven't watched the first season, watch that first.