I highly recommend staying at Sofie's place. She's a wonderful host and will provide all the help you need. The room is big and comfortable. The apartment is 5 or 10 min walk from the Valby station that will take you anywhere. It's not in the touristic area (which I loved), but in a very nice residential area that has restaurants and stores everywhere. It's very easy to access the touristic area from her house. I was very happy to stay at her place.