Communication with Michelle was very smooth, prompt and helpful. She and Seriyane accomodated our shifting arrival time, and later check-out, which we really appreciated.
The apartment is located on the third floor, so you need to be prepared for a lot of climbing and have not too heavy luggage.
The apartment has a large bedroom and hotel sized kitchen/living and bathroom areas. It is in a bustling, multi-cultural area with some terrific restaurants. Of particular note is Infame, the food is amazing and the prices reasonable.
The Interdente Metro is just at the corner, and very convenient for getting around the city. Rossio train station is in walking distance if you are going to Sintra.
The main shopping area is also within a 15-20 minute walk.
We'd recommend the apartment for two people only.