We (family of four, including 2 student sons) stayed for 5 nights in Sanne's flat in Copenhagen and had a really great time. The flat provided everything we needed: It has three spacious and separate bedrooms (one with a double bed, the others with single beds) and Sanne had kindly provided some cupboard space for our stuff. There is a kitchen with all facilities that we needed and a comfortable and cozy sitting/dining room. The shower room is very small, which might be an issue for very large people, but it was perfectly good for us.
The flat is located right next to a train station (one minute's walk) where one can catch S-trains into Copenhagen's centre, we never had to wait for more than about 8 minutes. Travel times to the centre are around 8 minutes as well. There is a very good Vietnamese carry out restaurant right beside the front door of the flat, and if one walks for about 10 minutes towards Valby, there is a good selection of various restaurants and shops. From Valby one can also catch trains towards Roskilde without having to go into Copenhagen centre.
Sanne picked us up at the local train station, took us to the flat, showed us around and spent quite a bit of time giving us advice and tips of where to go and what to do. She had provided us with maps, crisps, and a bottle of wine (much appreciated), and was generally a perfect host. Communication before, during and after our stay was simple, efficient, and pleasant.
As I said, we had a great time, and anyone planning a visit to Copenhagen should seriously consider Sanne's flat, you won't regret it.