You would have a sleeping couch (1,60m) in the living room with a TV and of course WIFi. You would share the kitchen and bathroom. The kitchen is big, fully equipped and has a small balcony to hang out.
The tram station (line 18) "Suelzburgstrasse" is 450m away as well as a bunch of restaurants & grocery shops. You'll be at the Kölner Dom in about 15min.