We had a very pleasant stay and the house was really comfortable and clean.
Old town city centre is just 15 mins walking and you have supermarkets, restaurants and public transports few steps away.
Internet connection is stable and very fast, there is a quite large television and beds are comfortable.
The shower is very large and there is also a bath tub to have a warm, relaxing bath after long walks in Prague.
I have only one small hint: consider to put a Nespresso machine so you can have a good coffee in the morning.
Definitively recommended.