Again, the performance was clearly that of amateurs rather than professionals. That said, the set and costume design were absolutely fine, the acting and music adequate and the singing good (except for some unfortunately consistent disharmony in the school board barbershop quartet, whose source I was unable to ascertain). The weakest part of the performance was the generally unimaginative choreography, which often was nothing more than characters marching round the stage and raising their arms in synchronisation. To be fair, it is my understanding that someone had to step into the role of choreographer at a late stage, which suggests that they probably didn't have all that much time to rehearse the dancing either, and therefore had to remain on the easier side of things.
There were odd moments - for example, when a very Dutch woman exclaimed of herself and her two children (both played by Hungarians) "Oh, but we are Irish!" But overall, the performance was enjoyable; it did a better job of conveying the energy of the musical than its beauty, but did a quite reasonable job of the latter too.
(Incidentally, a more mainstream reference to The Music Man than Harry Potter fanfiction: Marge vs. the Monorail)