I'm guessing you're referring to her July 29th itinerary? If yes...
Reykjavik - you dock in town, but there's really not that much to do in town. There are 2 excursions that I highly, highly recommend there. The first is normally referred to as the Golden Circle, an all-day tour. The three main sights are Geysir (interesting series of geysers); Gulfoss (a beautiful high waterfall); and Thingvellir, site of the world's first parliament (some ruins still visible) and the place where the tectonic plates of the European and North American continents meet. You can place one foot on each continent. The other is about a 4 hour tour, called the Blue Lagoon. It's a large, thermal pool about 20-30 minutes by motorcoach from Reykjavik. The mineral waters are very warm, and those who venture in swear that it helps them. It's a very surrealist scene.
I've not been to Akureyri.
Aalesund Norway (you dock in town) is a pleasant place to walk. But the cruise lines normally offer numerous excursions in the fjords, so I would urge you to explore them.
Hellesylt is a technical stop for those wishing to disembark and take the train overland to Geiranger. The train has pro's and con's. The scenery is magnificent, but it can be crowded. The ship continues through the Geirangerfjord to Geiranger, at its head. If you want to go ashore, it's a tender disembarkation (very smooth waters). The town is very quaint. I suggest taking the motorcoach tour up to Mount Dalsnibba, the high peak overlooking the town and fjord. Whenever you see a photo looking down on the head of Geirangerfjord, it's taken from Mount Dalsnibba. I have always stayed aboard between Hellesylt and Geiranger because the scenery is so magnificent.
I've not been to Olden.
Bergen - you dock in town. It's a very historic city, second largest in Norway. It used to be part of the Hansa League in Medieval times. It's pleasant to walk around. If it's a clear day, you can take the funicular to the top of Mount Floeyen - great panorama. I've always found Bergen the most reasonable place in Norway to buy souvenirs and Norwegian woolens. There's also a wonderful marketplace within walking distance of the dock. Bergan was also the home of Edvard Grieg, the famous Norwegian composer.
Hope these little tidbits give you some food for thought. I might mention that I have mobility issues because of a bad knee. There are taxis in Bergen and Reykjavik, they're few and far between in the other ports. But I would suggest Princess' motorcoach tours for anything that's of interest.