Pros: adorable little flat in a fun neighborhood, you really get a feel for local life. Visit the beautiful cemetery, and thrift stores! And a great location for bilking everywhere in the city, but that might be all of Copenhagen. Great communication with host and easy check in and out.
Cons: the building is quite loud, you'll hear everyone going up and down the stairs so you'll wake up when everyone else does. And the bed seemed quite small for two average sized Americans, we've never tried to share a bed that small!
But all in all the pros outweigh the cons, we had a great stay and would recommend! It really felt like we were locals for a few days and I love that.