We had a good stay as a group of 7.
You have to pickup the key at a different location, but Appartment and Key pickup where in a good walking distance to the train station. The Appartment was big enough for 7, but one person needed to sleep on the sofa in the kitchen.
There is one WC and one room with the shower and sink.
The most valuable is the location of the Apartment. It's direct in the city center and everything we wanted to explore was within a walking distance.