My wife and I spent 4 nights at Antonio's place, and we enjoyed it thoroughly. The flat has been revamped very recently and all looked brand new. Everything in the flat works perfectly and looks beautiful.
The location - right in the hearth of Alfama - couldn't have been better. And the view from the little balcony is breathtaking. It is a bit like having a private 'miradouro' at home.
Antonio has been a great host. He was waiting for us at our arrival and he surprised us with a nice bottle of Portuguese wine, fruit, coffee, teas, etc. He is very kind and friendly, and very respectful of the guests' privacy.
Very recommended!
ps. there are some steep stairs to climb on the way up to the flat - but the view is such a reward for a bit of effort