We stayed for a week in Sidsel's apartment and we really enjoyed it! Communication with Sidsel was perfect from the very beginning, although we never met, she was always available through email/sms and always gave a very quick and thorough answers, which we really appreciated. Apartment is quite big (much bigger than I actually expected from the pics!) and has everything you'd need, with very well equipped kitchen and "normal" shower. Location is pretty nice and well communicated with the very center, but it's actually a walking distance and we often took a walk instead of bus. We also met the neighbours above and they were a really nice and helpful couple.
If you visit Copenhagen, I highly recommend Sidsel and her apartment - you gonna feel like home.