We loved the Designer's Nest and our 3 day stay was wonderful! The apartment was just as described, filled with light and a lovely little terrace to sit and relax. Plus bonus was the generous use of kitchen, including leftovers (thanks for the jam and coffee!). And laundry. And Christiana bike. Loved having the bike available to see the city the Copenhagen way, and being in a real neighborhood. A friend of Sille's met us and showed us to around the apartment. The only issue we had was that our cell phone wasn't working, which makes it hard to connect BUT Sille was amazingly flexible and fast when I asked her to use email to communicate and got right back to me. The location was great - near a wonderful urban park to the north and the city is within walking distance -about 15 - 20 minutes at a good pace. Grocery stores and coffee shop within one or two blocks. Getting there- We were unsure about transportation so took a taxi from airport but we figured out public transit during our stay and it was actually an easy trip so we took that back to airport. Short bus ride to town, then transfer to train (~30 minutes total travel time). Bus stop is just around the corner from the apartment so easy even with luggage.
One note - several flights of stairs so if you have heavy luggage- just plan accordingly.
All in all - lovely spot for exploring Copenhagen.