Let's start with the bad stuff: there is no central heating, only a portable gaz heater. This is only supposed to be used in a well ventilated appartment, which it is not. Armed with a nice glass of porto in my left hand and my iphone in my right I did the math: no oxygen would be left after 30h. So be sure to tilt the windows open.
Also there is no 30mA residual-current circuit breaker so don't stick your fingers in the sockets.

But please don't get me wrong: we loved our stay!
It's a lovely appartment like you can see on the pics. Very clean.
Location is great.
In retrospect, having such thick walls must be very nice in the summer.