I used to work at the cafe here, and sometimes got to watch performances for free.
I was very, very surprised at the quality of the performances, considering this isn't exactly New York City or anything. No words for it. This isn't community theatre. Not even close. Just beautiful voices, all the classics, and they rotate showings yearly so it isn't the same stuff each time. I've also heard that the person who does costumes here is widely recognized. If you like opera, you won't be disappointed.