After booking the apartment, Alex and Kate sent us detailed information about our stay and Prague in general, like how things work in the Czech Republic. We were also offered a ride from the bus station to the office (extra fee, but still!).
The location is very close to the centre of Prague's Old Town - we only had to walk a few minutes to the Astronomical Clock, and could also reach everything else by foot. The apartment was very clean! You have everything you need, e.g. tea, coffee, sugar. I highly recommend one of their apartments for staying in Prague!