I enjoyed my stay at Michael's place a lot. It's a small but very comfy apartment with everything you might want - even a dishwasher and ... a PlayStation with an AmazonPrime account (which I extensively used :D )!
Michael is a great and helpful host, his reaction to my questions was fast and extensive. The location of the flat is very good (walking distance to the very city center and 3-5 min walk to the Wien Mitte station).