It doesn't get any more central than this in Copenhagen - at the bottom of the pedestrian shopping street, right next to a Metro station of the new Circle line and under 10 minutes away from a Metro station that takes you to the/from the Airport. Pretty much everything in the city centre is walking distance and there are a number of excellent cafes, restaurants and supermarkets within 10 mins walk from the property.
Instructions from hosts were very clear and accurate, making check-in/out super smooth. Early check-in/late check-out (within 2 hrs of standard times) available for a fee and the lads at Nest are very helpful with organising that.
The place is very sizeable by central Copenhagen standards, though smaller than the pictures imply. It is on the 3rd floor (if you count the ground floor, it's 4th) up a winding staircase - charming and with lots of light.
Previous reviewers mentioned the stains on the sofa - we just put a couple of the spare bedsheets on top and it was OK :)