This was a really lovely stay :) The location is excellent, near loads of shops, bars and tourist sites, plus 2 minutes from the main train station. And round the corner you can get delicious pasteis de nata for €1! Good communication with the host, a comfy bed and great value for money. The windows were pretty soundproof (although in hot weather you might want to open them, and the street is quite busy). Maybe not for very light sleepers.
The only minor criticisms are that the bathroom could have been cleaner when we arrived and when we were there the shower head did not attach so you'd have to hold it.
Overall we would recommend it, particularly for young travellers :)