When we came to the airport, Antonio had asked me to write to him, which I did, but unfortunately, I did not get any respond. Instead, when we were almost at the flat, Luis (helper) wrote that he would be making our check-in. Luis was a great help, and both he and Antonio sent a list of different activities and things to see/eat in and around Lisbon, which was helpful.
The flat itself may seem noisy as we heard a lot of what was going on in the flat above ours, which was unfortunate. The terrace is older and in a worse shape than on the pictures but is still nice when the sun is out. Also nice that there is an umbrella.
Overall we got good tips for sightseeing, the flat is very nice and the location is great - quiet but central.
Would recommend.