Nine on Rhine is everything it appears to be in the pictures and more! I stayed with three friends for three nights, and the flat suited us perfectly. We really liked how the neighborhood was quiet at night, but that we could walk down to the grocery store, restaurants and shops during the day. Generally, it's perfectly centrally located between city center and the west side beaches.
Inside, you'll find everything you'll need--dishes, utensils, plenty of towels--definitely one of the better equipped Airbnbs I've stayed at.