As good as 30-second commercials can get. If you love Mahouka, there's no reason to skip this as it's only 2 minutes total. Obviously, you are not going to get any story here as it's just a collaboration to catch attention, get laughs out of the audience and promote the Mahouka movie. The series of commercials makes gags out of scenes in the TV anime (except the 3rd one) so if you know and remember the actual scenes/lines spoken by characters, it's pretty hilarious. I personally watched each commercial several times and it still manages to make me smile.
If you're not a Mahouka fan or you hate Mameshiba for whatever reason then this is not for you.