We stayed in late November, so it was extremely quiet. The location on the front is great. There are driving restrictions in Calella, so you are not able to drive directly to the location, even for dropping off luggage, so be prepared to walk with your bags.
The access to the apartment is in the alleyway to the right-hand side of the building.
On entry, the whole apartment smelt of cooking / food prep. We found that there is a vent in the washing area from the restaurant below, which fills the apartment with smells unless that door is shut. If the bathroom window is open, the smell will go through there instead. Keep both doors shut, and it stops it.
On Saturday at 15:07, we sent a message about the possibility of extending our stay beyond Monday. we had no response until Monday 10:27. Ultimately we didn't need to extend after all and the lack of communication didn't affect us, but no response for nearly 2 days was poor.
Aircon heating was sufficient.