We had a lovely time in Porto en in Carolina's apartment.
The small heater was welcome, as it could be a bit cold.
The apartment is perfect, spacious and cosy. It has everything you need, (no tv, but that was not a problem for us), the wifi is great, the balcony, kitchen bathroom too.

The location is perfect, a second away from the bridge and very close to the subway . Your are close to the Ribeira but also close to the center where all the restaurants and bars are located.

So I would definitely recommend!