Since this was our first cruise ever, our experience may be different from some seasoned cruise travelers who may have different expectations of what a cruise is. As travelers we are fairly independent, like making arrangements for ourselves, and tend not to do bus-tours or group travel. We selected this cruise because we wanted to see the Northern Lights and this cruise provided the benefit of seeing gorgeous scenery in case the Lights didn't happen. We weren't in it for the ship, so a gussied-up ferry suited us well.
For those of you who are deciding if a Hurtigruten cruise is for you, let me start by saying what it is NOT: uber-luxurious. There is no casino. The main entertainment was one guy playing an electric piano singing songs of the 50s - 90s in a mix of English and Norwegian each evening in the bar. There are two hot tubs on deck, a sauna and a very small workout room. There's reliable wifi near the internet cafe and they had 4 slow-ish computers for free usage. The Midnatsol holds 'only' 1000 people. I'd say 90% of the people on board (as cruisers, those not just using the boat as local transportation) were retired. It was mainly a mix of people from Germany, Norway, and the UK with a few North Americans.
It's not cheap on board or on land in Norway - if you haven't been before, prepare for sticker shock. It's much more expensive than you think possible. A sandwich lunch for two with soft drink or bottled water is easily $50.