The location of this place is incredible! It's located in one of the oldest and most beautiful parts of Lisbon and one of the few to survive the earthquake. There are so many things just around the apartment, and everything we wanted to do was within a 20 minute walk or less (plenty of transportation options too).
The apartment is small; I wouldn't recommend four people staying, it was perfect for the two of us though. It was modern and clean, and had pretty much everything we needed.
One tip, be careful not to make too much noise-- the front door to the building slams quite loudly, and I guess the apartments are not too soundproof; we got scolded by a downstairs neighbor a few times when we accidentally dropped things on the floor.