We had a really a lovely stay!
Sérgio has been very genuine and welcoming. He was flexible with the check-in/check-out; he even waited for us to find our way to the apartment although our flight was delayed.
The flat was a bit small but brand new, clean and well furnished.
The position of the place was very close to the centre and 15 minutes walk from the railway station allowing us to reach the surrounding areas easily.
If I had a chance to go back to Lisbon I would definitely choose that flat.