This is a beautiful theater with very nice interiors and architecture. I'd recommend paying a bit extra for the good seats (stalls or parterre sections). No seat is a bad seat, but it really does make a difference to be up close since the cheaper seats are generally way up in the rafters, making viewing a bit of a challenge.
I'd also recommend buying your tickets directly at the theater. There has been more than 1 occasion where we've purchased tickets from ticketservice.nl and the venue has screwed things up with booking multiple parties in the same seats. They definitely need to improve their system for bookings, or at minimum, handle the situation in a proper way when mistakes occur. When this has happened, they've even moved us back into cheaper seats than we paid for, which was quite disappointing.
That said, the venue is beautiful, and aside from the poor service of seating attendants on the ground/main floor (parterre), it's a very nice place to see a concert.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.