We spent 4 nights in André's appartement in march 2015. The flat is brand new, well renovated with taste. We really enjoyed the balcony with the sea view.
It's perfectly located in a famous street, 10 minutes by feet to the Praça do Comercio.
We didn't suffer from the noise, probably because it's located in the bottom of Bairro Alto.
André was a great host, he met us the first day and gave us precious advices about restaurants and bars in the neighborhood.
It was a really good choice and we had a perfect journey.