The flat is great, we really enjoyed it, it looks exactly as shown in the pictures including the view which you can enjoy while having breakfast every morning.
The apartment is clean and bright and has everything you need (just be careful with the amount of electrical devices you turn on at the same time or else the power might go off).
The area, after being in a lot of places in Lisbon, was proven to be the best one (many sights, bars, restaurants, bus stops/train station are on walking distance, etc). Overall, this is the perfect place for your stay in Lisbon and I would definitely stay again.