From my small experience in Sweden's motorways, consider that it'll take more time than you thought to get anywhere because:
A. it'll be raining (usually, hard)
B: the speed limits are low and HAVE to be respected
C: there are a LOT of lorries on the motorways, blocking the way. Not all routes are large highways.
On the other hand, it's been 20 years since I was on Swedish territory, so things might since have changed... I plan to do a trip up there (Norway) in the next 3 years (Ole, I'm coming)... keep us informed of the outcome.