Lasse was very nice, he answered every question we had and made us feel welcome. The flat is amazing, it has a balcony and a very relaxing atmosphere. It's very spacious, easy to keep it clean, well equipped and full of light. Shops are nearby, it's close to the central train station. There's a bike rental opposite the flat which we used; supercheap I think and fun. Parks and green areas are near, pubs and places to grab a bite as well.
Lasse waited us with clean bedsheets and towels. We could use basic things like oil and salt for cooking and obviously plates and pans and stuff like that.
All in all we had a very good experience, if we ever go back to Copenhagen I would have Lasse as a host again.