I take this train 3-4 times a year going from stockholm-luleå and it's great. You can get a 6 person cabin when travelling in a company of 4 which is great when you have small kids. This way you a whole cabin for them be pains without disturbing anybody else and it's much more of an adventure and much more cosy. I would love to have more good alternatives to travel by night trains because I really dislike airports and flying. One of the problems is that it's much more expensive to travel by train than the flying alternative.