Karen's apartment it's truly lovely and it was exactly what we were looking for. It is beautifully decorated, big enough for us (we were 3 people) and actually bigger that what it looks like in the pictures. The location was perfect to walk around Prague.
Karen was a wonderful host, very welcoming and she shared a lot of information that were very useful during our four days stay.
I will totally recommend this apartment and it would be my first option if I'll be back in Prague.