First you need to go to a central reception in Av Liberdade and only then you can go to the apartment. That takes you min. 45 minutes extra, plus twice in and out of public transport, Ubers or taxis.
When arrived to the apartment it was cold and no warm water was available. No instructions on how to activate heating and warm water. It was 22:00 and the customer service didn't respond anymore until the morning after at 9. I managed to activate the heating after a while, but not the warm water. Had to take a cold shower. When the customer service finally answered, it wanted me to send photos of control units and heaters, instead of sending a person to solve the problems. Eventually I solved them on my own, but had to switch on a series of controlling switches in a box hidden in the wardrobe.
The day after, I left the keys at the reception, and was offered a luggage box for free until my departure, which otherwise would have costed 6€ extra. That was the "repair" for the bad service. OK