My wife and I stayed in the apartment, and it was amazing. It has everything you'd want - nice bathroom, big kitchen, roomy living room area, and a cozy bedroom.
This was our first time in Lisbon, so we weren't sure what to expect. The location is perfect - you can walk just about anywhere in the city in about 15-20 minutes. It's a beautiful, walk-able city, but if you don't feel like walking, they have buses, trains, and elevators all over the place. The main train station is maybe a 10 minute walk from the apartment, so if you want to explore outside of Lisbon, it's very easy!
Overall, it was a great experience and we cannot wait to come back and stay here again.