I chose klaus’s place because it was close to the old city and was affordable. But after I stayed there I realised why his place is so popular. He is friendly, anticipates what the guests needs, makes it very easy to check in and check out, and overall makes you feel right at home. There are some great eat outs right next door. If you want to walk around, you are close to everything. And tram is easily accessible as well. My room was clean and warm and spacious. I could read and work in my room as well. I recommend this place to anyone going to Vienna.