Carlos was a fantastic host, always available and responsive. He offered solid tips on local eateries and even got us a 20% discount at his family's restaurant below the apartment. It is a Fado restaurant, and I highly recommend it for both the food and the Fado!
The bed is comfy, the shower has good pressure and lots of hot water and the apartment is quite spacious for Europe. The location is good, especially if you want easy access to restaurants and bars, but they are mostly touristy. On weekends, the streets were noisy until 2-3 am and even though the windows are double-paned, it still woke me up repeatedly. Also, the residents who live above the apartment are not quiet; they have a young child and a dog, like to watch TV late at night, and walk heavily on a seemingly bare wooden floor....all of those things make considerable noise that is heard directly below.
In summary, Carlos is great! But if you are a light sleeper, there are drawbacks.