We stayed in the apartment for a week, 4 adults. It was a bit crowded but fine. The key-box was a good solution for us as we arrived late at night. The apartment is very well equipped, we really felt at home.
On the first day there was a problem with the shower, but I wrote to Sarah and on the same day somebody came over (while we were out) and fixed it. The only think I would improve is that we didn't know when the housekeeping will come, and each day it was a surprise whether they came or not. I think they came every day except the weekend but I am not sure. Anyway a great stay, and of course a great location, I highly recommend it.