The apartment is nice, rooms spacious and tidy, beds comfortable. All the amenities offered are available. The kitchen isn't big but sufficient, with enough pottery and cuttlery even for a family of 5.
The weakest point is bathroom - small and not as comfortable as the rest of the apartment, still bearable.
The apartment is situated in the very centre of Copenhagen and all the main attractions are within walking distance (up to 20-minute walk to the farthest places). If you want to, though, metro and bus stations are really close.
After a five-minute walk you'll find yourself in Tivoli foodcourt - a nice place to eat for a family.
The disadvantage is the noise at the weekends - there are many parties nearby which can last untill the morning, but that's what you can expect in every city centre.
The host is very communicative and helpful.
I truely recommend the place.