The apartment was nicely decorated and renovated. However, the flat could have been cleaner. The sofa was stained and the tiles in the showers were yellowing. The sink in one of the bathrooms was leaking.
Most of these can be overlooked, but the most annoying thing were the ongoing renovations. This meant that the windows were completely surrounded by scaffolding and then taped up completely such that we couldn't even let fresh air in. The view which we were looking forward to were completely obstructed. While the host may not have been aware of this in advance, I'm sure the building owner would have communicated this well in advance.
The WiFi was very slow and the signal in the bedrooms was so poor that it was basically unusable.
A redeeming feature is the modern kitchen and the flat was nicely decorated.