Nanny's and Christian's flat was a good base for our weekend in Copenhagen (and it really is close to the airport - especially practical when combined with their kindly flexible check out!)
The area is safe and easily accessible by bus (which seems to be the best way to get around a lot of Copenhagen) and not too far from the metro either. A slightly tight squeeze for 5, but the blow up mattress was the best I've ever seen!
Nicely decorated flat with everything you need - would recommend to others!