We spent 3 nights at Maj and Uffe's place. We were 9 people.
This place was perfect as the house is very functionnal, very clean and well equiped (the only small weakpoint is that only one shower is available, but it is not a so big issue when the group is well organised).
The house is in a nice and in a quiet area. There is a grocery close to the house (less than 5 minutes walks). It is really easy to reach the city center by bus (at least three lines available ) in less than 30 minutes. Maj arranged a bike rental for us and biking is also an easy way to reach the center and enjoy the city with this means of transport.
And to conclude, you will feel as if you are in own house as Maj and Uffe are really discreet. They are really discreet but you can trust them to answer all your questions and help you when needed.
I warmly recommend this accomodations for your stay in Copenhagen, you won't regret.