Karl & Lisa's apartment is such a lovely place to stay in. It is cosy, and very homey. Perfect for a couple or a solo traveller like me. The neighbourhood is quiet and peaceful. Communication with Karl & Lisa was excellent, they answered my queries promptly and accurately, especially when I was a bit lost in town. I arrived much later than anticipated (close to 12 midnight) ,poor Karl waited for me when he didn't have to. I truly appreciated that. The apartment is just minutes away from the U3 line and for those who love Turkish food, there's a restaurant called Kent Restaurant nearby. I highly recommend Karl & Lisa's apartment to everyone and I will surely stay with them again if I visit Vienna.