They guys are lovely, friendly and very welcoming.
Jan picked us at the airport and back for a reasonable price, while Jana welcomed us at home with a map ready to use and suggestions. The flat is located in a nice student area up to the hill. Nice 30 walk down the hill to reach the city center, not so nice on the way back but metro station is 10 mins away. The flat is very clean and has all you need. In addition there is a portable wifi to never get lost in Prague.
Since we travel with a 1yo kid Jana also provided us with a cot for him.
I really enjoyed Prague and not only because the city is beautiful but also because we stayed in this flat.