When we first arrived at the scheduled time 3:30pm we were greeted with the host from concierge unfortunately the apartment was not cleaned as the previous visitors stayed long after the checkout period and because of the operational issues they were short of cleaning staff. To bad it wasn't communicated in advance that we should come later because of this issue. The host from concierge wasn't experienced as it looked like it hers first handover and told us that we should call the help-desk to sort everything out which wasn't really professional. When we came back to the apartment everything was sparkling clean and in the end all worked out after some communication with the help desk. If i come back to Porto i might give them another change to redeem themselves and see if service improved as some issues were unforeseen(lack of staff because of illness) .