The apartment is really nice - just like it appears on the pictures. Everything was perfectly clean upon arrival, the kitchen and bathroom were well-stocked. Helen and Seb are very responsive hosts, replying almost immediately to emails / other electronic messages or phone calls. The location is optimal -- very centrally located but in a quiet street -- with only one downside: there is little natural light coming in, due to this ground-floor apartment being closely surrounded by other three-storey buildings.
Apart from this, it's a 10 out of 10!