All depends on the exhibitions which change often. The staff of the museum is very friendly and helpful. We have seen a movie which was bizarre (to be expected in the contemporary art museum) and Janek Simon's exhibition which had some interesting parts: Nollywood (Nigerian movie industry) - idea of remaking Polish classic "Ashes and Diamonds" in the Hollywood convention, reflections on Polish maritime traditions and colonial ambitions from 1930-s.
There is a good restaurant in the building and if you like long walks, you can start there and walk towards the river and continue on Vistula Boulevards towards the Old Town making a long, diverse and satisfying day.