Lenka’s place is right across the park from the Prague Main Train Station. It is a mere 5 minute walk from the exit of the station. If you are travelling by train and want to stay near the main train station, this is the right place for you.
Also, Lenka’s place is walkable from the old town square. If you feel up to it, you can walk to the Charles Bridge and to the Prague Castle—which is around 3 kms from her place.
Overall, Lenka’s place was nice and I will look to book her place again when Ingo back to Prague.