The first thing I think of when I watch this, is how similar the premise is to Tex Avery's 'Magical Maestro'. In both cases someone wanders (or is chased) into an opera theatre, and proceeds to turn the tables on his antagonist. So what are the diferences?
Well Chuck Jonnes' effort is far more sophisticated, literate, and clever. There is excellant synching of music with vocals and gags (even if the music isn't all from the same opera). Technically it's impressive. But to be blunt, Avery's is just bloody funnier.
Plus, to me, the gags in this short just seem to get more repetitive and unfunny as it goes on, whereas Avery's were just lunatic and never made any sense in the first place.
I'm sorry to to be the one to dissent here, but I don't think this is a four star short, or a top 10 animated short (whatever Jerry Beck thinks). I had a tough time deciding between 3.5 and 3.0. What decided me is that I'd already given 3.5 to 'Magical Maestro', which I prefer.
BTW this is one of the most Freudian WB cartoons I've ever seen. There are more phallic symbols than you can..... shake a stick at.