Karen's flat is very well located as it is very close (15 minutes walking) from a lot of touristic and interesting sites. It is very cosy and comfortable. You feel like home.
On top of that Karen was very helpful to make our arrival easier by organizing our transfer from airport with a very nice driver that gave us the keys.
And of course she provided us with tips and good recommendations.
I definitely recommend her place to anyone who want to spend few days in Prague!