The cruise terminal was an approx. 10 minute walk to the city. The city was quite small and easy to see all of the sights in the timeframe. Tip - dress nice as most people are dressed well :) ...
Very easy to walk to old town from the ship. I recommend Rick Steve's Scandinavian & Northern European Cruise Ports book, it has directions and a walking tour you can follow. We ended up doing a little trolley ride around, which was a cheap way to get a quick overview of the sites. ...