My friend and I spent 4 days in Samuels apartement in Lisboa.
The location of the apartement is really convenient for sightseeing. A lot of places are in walking distance, so we walked a lot. Only when we went to Alfama and Belèm we used a tram. The line of the famous bica tram is right in front of the apartment.
There are a few nice little restaurant close to the apartement. We loved "A Tabacaria" which is at Rua de São Paulo. It's a small bar who opened a few days before we went there. Right in front of the apartement are two bars. Therefore it was noisy sometimes at night.
The apartment was very clean and we had everything we needed. But you have to be aware that the shower and toilet are very small. When you are a tall person it could be uncomfortable.
Overall the had a great time and recommend Samuels apartement for your Lisboa trip. Enjoy!