Been there a few years ago. it was during summer with 24h sun with amazing colors all around and nice weather just above 0c so you can do lots of outside activity. I am planning to go back there in the winter with moonlit sky and the aurora borealis. I will be looking into Radisson for sure. It's good, nice breakfast which was identical to the breakfast you get in any Radisson in Norway and OK rooms and you can say you've been to the most northern hotel in the world!