We had a great time at Karen's place. The neighbourhood is really nice, lots of bars/restaurants/nice places to hang out nearby. Also Karen was a perfect host and helped us with lots of things (including finding a parking place which is not really easy for Copenhagen).
The apartment was definitely big enough for 3 persons, really clean (including the towels and bed sheets) and it had a dish dish washer and a washing machine which is really convenient.
All in all a great experience, thanks Karen!