Most of the locals remembered this place dearly when visiting Copenhagen, so when it finally opened a branch in Reykjavík it immediately was a huge success. It's family friendly and the food is proper.
Once deemed to be the most expensive burger joint in Copenhagen is actually decently priced in Reykjavík. Good place to visit if you have little rascals travelling with you as they have a playroom.
As the name suggest, they do have washing machines.