In our case we felt cold in the apartment. Every day we were out until night and when we arrived it was impossible to heat it with the stoves provided (pellet and oil stove) .
We could feel humidity from the apartment as well as the building so I think this made it difficult to heat too.
The beds as well as the duvets were good at least we could feel warmer than outside.
Otherwise the apartment is nice with good location.
Virginia