A good stay overall but we wanted to develop a little bit more:-)
Let's start with the positive points, the localisation of the flat is great, 2mn walking to the famous Ponte Luis I (upper deck).
The contact with the agency was great, Vitor was waiting for us when we arrived late at night at the flat and he took time to answer to all our questions and gave us good tips.
The agency organised the transfer from/to the airport, the driver was really friendly.
Concerning the flat itself, we found it clean, same with the towels and sheets, however it is a bit worn down (it has seen better times).
It's high time to refresh it a bit.
Kitchen is well equipped as well, probably everything that you might need is there.
Concerning the negative points, there is a main one, the noise. The flat is extremly noisy (thanks god we had our earplugs with us) but still we could hear the cars from the road a lot. Maybe a little bit less noise in the room with two single beds because it's on the other side. We were disturbed as well by the neighbours from the floor above who were moving chairs and other stuffs at 6 o'clock in the morning every day.
Last remark, there is no air conditioning in the flat and it was quite hot during our stay mid-october. Even if there are fans it must be difficult in summer, especially if you have to leave the windows open.