Our stay worked out very nicely. Manuela was very quick to answer every email, and to address every question we had. The apartment is very clean, and cute. As it is on the top floor, there are dormer (slanted) ceilings, so in the kitchen and the sides of the bedroom, you have to watch your head if you are tall ;) The bathroom is beautifully done, with a view from the large bathroom window that is fantastic ! My only suggestion would be to have a hook on the wall in the shower area, for the shower head. Maybe this is more common in Europe (we are Canadian), but we found it a bit tricky to shower while having to hold the shower head. The bed was very comfortable, with a very firm mattress. There is a good air conditioning unit in the bedroom, so on a hot day, it quickly cools the bedroom. It was very hot in Lisbon while we were there, so the air conditioning would take quite a while to cool off the other rooms in the apartment.
You do have to walk up 3 flights of stairs (19 steps each), so this apartment would not suit someone with mobility issues.
But Lisbon is so hilly, you are already walking up and down a lot ! The area (Bairro Alto) is interesting - the side streets all around the apartment offer MANY different restaurants that are inexpensive, with local Portugese cuisine. We had a couple of dinners in the area, one with live Fado singers. Also, the bakery Manteigaria is just down the road, and I thought they had the best Pasteis de Nata (Portugese custard tarts) in the city. I even thought they were better than the famous ones in Belem. At Manteigaria, all they sell are the Pastel de Nata, and they are heavenly. As well, it is only a 10-15 walk to almost all areas of the city, such as Rossio, Baixa, Ribeira. For dinner or lunch check out the Time Out market - a foodie feast ! When you walk around the area, it may seem a bit rough around the edges, but it is very safe, and you feel you are living like a native Lisboan, not a tourist. The area has a young, hip feel, but with a lot of locals too.
So I would definitely recommend this apartment, which is very good value for the money (as long as you can lug suitcases up 3 flights of stairs !).