Ana and Mariana's apartment was spacious and homey. I like the fact that there's a washing machine in the flat, which makes extended stay possible. The flat is also around 5 to 10 minutes walk away from the Martim Moniz Station. Rossio Station is also within walking machine. The neighborhood is also surrounded by great restaurants, so you wouldn't be out of dinner options.
For travellers with large luggages, please be aware you will have to face a few slopes and stairs during your walk from the nearest station. It's not a problem exclusive to this apartment, but a general description of Lisbon as a whole.
I had a great time in Ana & Mariana's flat and I may return if I ever visit Lisbon again! :)