My wife has a kronan (Well, she has about 8 bikes, one of which is a Kronan). Single speed. Coaster brake. Cast iron fenders and chain guard. Okay they are not really cast iron, but the bike IS very heavy. Perhaps 50 lbs. It has huge racks on both front and back. It's really made for carrying stuff. Long wheelbase! It has a lot of squeaks and noise. This would probably improve if someone lubricated everything and tightened all the nuts.

She uses it mostly for riding to the gym or grocery store. ~2 miles, with a small rise.

I think 6 miles would be pretty far to commute daily on one of these beasts of burdon.

I note that this morning, Marcia took the San Jose to the gym. (Single speed, steel Bianchi). The San Jose can easily be set up for commuting, with a rack and fenders, and is IMHO a more suitable choice for a flat 6 mile commute than the Beast from the Low Countries.