Well... All I can say - it's a great apartment.
First of all it's very authentic, located in the historical place and you can easily imagine yourself how people lived here a couple of centuries ago.
It's quite small, but due to the perfect design you'll not notice it at all. Great work of designers. The living room on the second floor is a great place to have a breakfast or to gather all inhabitants. We really liked it, cause we didn't have luck with weather and had to spend a lot of time inside.
Location is great. But it's party-district of Lisbon, so you should be ready for it. Soundproofing of the windows is perfect. You really don't hear anything from outside, so parties don't disturb your sleep at all. Since Bairro Alto is a hill, you should be in a good shape to reach the apartment, or you can use the elevators, which could be a little crowded due to the tourists.
Manuel was a great host. He waited us in front of the door, and gave us the keys and general city and district hints.
As I said we had no luck with the weather, so we definitely want to return to Lisbon at least one more time. And, I think, we gonna stay at this place if it will be possible.