We stayed at Ulrik's place for 3 nights for a break exploring Copenhagen. It's within walking distance of the city centre (about 30mins) with other sights and a great food market in the local area. There are local buses close by which were helpful when we had our luggage.
Ulrik's emails were really helpful locating the apartment and he was responsive to questions we had.
The apartment was just as we expected, lots of stairs to climb as mentioned in previous comments. Not the cosiest/comfiest of sofas if you are spending a lot of time there!