I haven't been to any other hostels in Copenhagen, yet I'm sure this one is the best option there is. The capsules are comfortable and give you privacy. The overall hostel has a nice and cozy design. The staff is warm and friendly and because it is a small hostel, the vibe is certainly different to larger institutions. It is also more quiet I think. Noise from the street can easily be cancelled out by the provided ear plugs. Breakfast consists of an egg, delicious cereal with yoghurt and one or two buns with jam and cheese, plus coffee/tea and apple juice.
The hostel is also only 7 minutes away from the main train station.
So if your looking for a hostel in Copenhagen, you should certainly choose this one.