I personally do love classical music once in a while, certainly when it’s performed by people who understand their job.
The Antwerp Opera is one of the hosts (together with Ghent) for the Flemish Opera and the Ballet of Flanders.
It defines itself with a mixture of classical and well known performances from E.g. Mozart (2015), but they have no fear to book a very experimental Opera or Ballet performance as well.
Most of the time the performances are of a very high level and slowly but steadily the Flemish Opera is building out its international reputation. This can be seen in ticketsales. Every single time I’ve attended an opera, the place was sold out, so book your tickets wel in advance.
The newly renovated building is pretty impressive as well from the inside, finished with a good eye for detail.
The public has a good view from any seat and the accoustics are ok for modern standards. Lots of performances are subtitled as well.
The Opera shows that Antwerp does not neglect its stubborn city behaviour (Alternative bookings), but looks after the quality served to the public. I’m not “the big connoisseur” but from my own experience, I’ve never come out disappointed when visiting a new production and they always score good reviews by the specialized press.