Just a warning, don't count on actually flying on a Norwegian 787. They've had problems with their RR engines and have been wet leasing old 777s, A340s, and 747s from companies like Wamos, HiFly, and Privilege Air to cover routes.
Yes. It’s all opinions but I am not a fan of Norwegian airlines. We booked with them recently to take our granddaughter on a trip to Rome. We booked well in advance, but just before the date they changed our flight two different times (both directions) which meant one day less on the way there, and almost a day longer with no hotel, late night flight back. In addition were informed (think it was Privilege Air) sluffed is off to another carrier with no inflight entertainment, less seat room, but...no reduction in price. By that time we had to accept, because it was too late to rebook with another carrier.
I’m not sure SAS is any better, both of them seem to be doing the same tricks but I trust SAS a little more.
Be aware too, because of their labor practices often there are strikes exactly in the summer months, vacation time, which seems in the last few years strands many travelers. The worst is, it is totally predictable, yet they do not seem to increase manpower on the phones, so each year you hear of travelers stuck, not able to reach anyone that can help them, not able to get customer service, etc.
It is beautiful here in summer, long days of sunlight. Winter too, if you like skiing, snow, darkness.
I prefer summer. I fell in love with Norway when traveling here for work, and moved here decades ago. Personally I love it here, and live in Oslo and love it!