Karl's apartment is absolutely brilliant, a thoroughly modern, stylish place with a comfy bed, a big sofa, and a massive TV (which we were too busy exploring to actually use, but it's nice if you want a quiet night in!) Karl was a great host, really attentive, responded very quickly to any questions I had and prepared a few thoughtful touches for us when we arrived. The value for money was fantastic. If we come back to Vienna, we'll definitely try to stay here again!