I recommend the apartment since it is charming, modern and well located. The flat is perfect for a couple or 1-2 people. In addition to the bed, there is also a sofa bed. It’s very modern and clean. Communication with the host was smooth. The flat is a 10 minute walk from good restaurants in Chiado, and close to a train station to get to Cascais. In the evenings, you can hear some music from bars since you are in the center but it was fine for us!