Qell situated accommodation and very very clean! Amenities are great and Lena was very communicative throughout. Only spot of trouble we had was finding the underground parking as streets are one-way and jam packed during the day (as with most of Lisbon).
The apartment is also located on the ground floor so you can still hear people walking by the streets at night from inside your room if you're a light sleeper. All in all a great place to stay!