We didn't have an excursion in Bergen but walking around town on the beautiful day we were lucky enough to have was just a lovely experience. A quite pictoresque town and the fish market was a blast. As a shooper, be prepared for some of the most expensive prices you've ever seen, however! That's pretty much true for every port on this cruise, but especially Norway.
We booked the train excursion thru RCI and it was magnificent. Not to be missed! Some breathtaking views of fjords and waterfalls. Same is true of Geiranger, our third port, Shetland Islands (Lerwich) and Faero Islands (Klaksvik), none of which I see on this survey menu.