Maria was a fine host, I did not see her for the majority of the time I was there. The bathroom is small--especially the shower space. The water pressure is really light as well, so if you have thicker hair, you might find it a little difficult to wash your hair quickly. This might just be a European vs. American difference, I'm used to slightly bigger showers. I also noticed there was no freezer (to put ice cream for a post-dinner snack), not a huge deal though. The room and entire place was very clean, during the morning there's great natural lighting shining through the windows, but during the night, it's pretty dim with only lamps to use as light.
If you don't plan on being in Copenhagen for long or will be staying in the airbnb for much other than sleeping, this does the trick in getting you a place to sleep for the night. This is located on the top floor (there's more like 6 flights of stairs to climb than 5), so you'll definitely need a good amount of energy to walk up there.