If you have this budget, I would recommend going to a hotel. The apartment is on the 10th floor of a very old building that used to be a hotel in the 1900s. It is quite a far walk (20-25 mins) from the Cascais centre. It has great views from the balcony but the apartment is north facing so you barely get any sun, maybe for an hour max in the morning. The airconditioning never worked. Ventilation in the bathroom is broken (I've never seen the fan turn on), after 1-2 days the bathroom starts smelling and it stays humid since you can't keep the door open due to the smell that will take over the entire apartment. The plugs come out of the wall. The frying pan is so old that you feel unsafe cooking with it. There's a TV but no netflix, no normal channels. The lift broke during our stay and the apartment is on the 10th floor. There is no way 4 people can fit in this apartment, max 2 people for maybe max 1-2 nights. Very disappointed by the amenities and the apartment, we would not recommend this place to anyone. OH and the wifi is terrible. We both had to work during our stay and it was impossible to have a Google hangout call. Despite having turned my video off, there were constant connection issues and we eventually had to go to a co working space during the day.