It´s a very nice apartment to spend some days while visiting Lisbon.
It is very well maintained, comfortable and stylish. You have planty of good restaurants and bars within a walking distance. Internet is very fast, which was important for me, as I had to work online everyday.
Things to take into account:
1) The kitchen is too small for normal cooking. It´s ok to make some sandwiches or an omelet, but for more than that you just don´t have enough surface to work on, nor space for storage. The dining table is stylish, but terrible uncomfortable.
2) The apartment is very underpowered. If you try to use the air-conditioning and the stove simultaneously, electricity goes down in the whole apartment. The same happens if you try to make some tee while washing machine is running for example, etc. so think twice before renting it in the winter, when you really need to use the AC for heating all the time.
3) It is absolutely impossible to find a parking spot in the area, so thing twice if you plan to use a car while staying here.
Enjoy your stay in Lisbon!