We loved the apartment, which is light, airy, full of character, nicely decorated with arty deco and comfortable furniture. The view down the street and out to the river and of the 28 tram passing under the window is just fabulous and the the sun shines straight in in the morning.
It is a bit noisy, with the tram and cars passing, but it's all going very slowly and it all calms down at night. I always wear ear plugs, so I slept very well.
Carlota is very nice and is quick to respond to problems. We had a problem with one of the beds the first night, and she had it sorted by the second night and volunteered to reimburse us for the first night, which showed a professional attitude.
So we loved the apartment, and being in the Alfama.
On the down side, there is a smell of gas from the gas bottle when you take a shower, which may not harm you, but is unpleasant.
There is no washing machine, which might other people spending an extended time travelling.
The steps up/ down are quite steep, maybe a bit tricky for the older or unfit traveller.