the kunstmuseum was great though the exhibition sucked (3 floors closed as they were working on the next exhibition).
the last one is a classic (among others they have several works by warhol and one by koons)
I love this Stirling building - its urban response is absolutely perfect. The path through the central core that allows you "in" to the musem without actually being in it - amazing. And a decent place to view art, as well. One of my top ten, for sure.