We rented a car at SIXT Olivais and had a really good experience. The staff were friendly and we received really good treatment. We rented a small 7 person car, we were 6 people, so there was room for 2 large suitcases and a small suitcase. The car was clean and was good to drive in. Their office location is really good, close distance to the railway station, it took about 15 minutes to walk. Directly opposite their office, there is a gas station, so it is easy to fill up with fuel when you have to return the car. We will rent a car from them next time we are back in Lisbon. We would like to give this place 5 thumbs up. 👍👍👍👍👍