Highly recommend this house and hosts!
Firstly, the owners, Mads & Mette, give a very good (accurate, descriptive) overview of their blue townhouse...so you should consider that the best reference for specifics. Mads could not have been more responsive to questions & informed. Great list of restaurants, cafes, high & low...the neighborhood, Fredericiagade, is pretty much dead-center for tasty food, great design.
The home is nicely appointed, casually stylish & warm. It's an easy house to relax in, with a balcony off the kitchen to enjoy a morning coffee, a more generously-sized balcony at the top floor with a picture-perfect view of the nearby church, perfect for an afternoon glass of wine, for stretching out, reading, taking in the light & neighborhood. We also enjoyed the shared yard, which is like stepping out to a small park with a friendly & interesting set of neighbors. We visited in summer, but in cold weather, I'm sure it's cozy.
The townhouse, arrayed on different floors, is filled with light. As Matts mentions, this might not be an ideal house if you have an infant, or someone with walking issues, as stairs are definitely part of living there. That said, we traveled with my 2 year old and parents, each 75 years old, and it worked for us. You quickly get used to it. The privacy is great, the staircase is beautiful & with all the good food, we all appreciated the exercise...
Trains are easy to access at nearby Kongens Nytorv. Distances are small, UBER drivers plentiful but Copenhagen is a dream of a walking city...