The apartment is absolutely lovely. Spacious, clean, good amount of hanging space, and fantastic views. There are 3 large patio-style doors opening to small balconies each with just about space to put 2 chairs out and sit in the sun with a view of the river and of the cathedral. Oh and no worries regarding noise from the cathedral, or anywhere else for that matter. With windows closed you don't hear a thing. The apartment's up on the top (6th) floor of the block but access is easy for most people, just a handful of steps then a lift and another half dozen steps.
We loved the position too. Step outside the front door and you're into the beating heart of Alfama with trams going by, cafes and restaurants all around, and your fellow tourists labouring up the street towards the castle and other viewpoints. 5 or so minutes walk down the hill and you're in the centre or at the Praca do Comercio with its train and tram links, including to Belem. Another pleasant stroll along the front and you're at Cais Sodre station for trains to Cascais/Estoril. So, a great position as well as a lovely apartment.