Brilliant! I caught a concert by the Symphony Orchestra of Montreal this past week and it was excellent. The wood interior is very reminiscent of the Strathmore in DC or the Walt Disney concert hall in LA, and the acoustics are excellent. Like the aforementioned, there are panels on the ceiling that can be adjusted to alter the sound of the orchestra below.
The entire concert hall feels very bright and natural. The interweaving of certain wall elements gives the impression that the structure was grown instead of built. In a word, it's beautiful.