It was good. Easy enough to find, very close to the central train station, and a clean apartment. However the area behind the train station (where the apartment is) is considered the Red Light district, which we learned from our tour guide after our night at the apartment. Makes sense, considering the loitering men, homeless people and strip clubs dotting the sides of the street along the way to the place. It was fine, we were safe, but I wouldn't recommend it for small children.
Pia herself is super nice and helpful! She has a clean apartment and is very easy going. She let us leave our bags in her kitchen after check out so that we could enjoy ourselves around Copenhagen without worrying about heavy bags. The apartment does smell like smoke however, though it wasn't a HUGE problem once we had opened our windows and aired out the room. Bed was so-so.
All in all, a good price for a decent place