Very cosy little place in a great location - just 5 or 10 mins walk (up a steep hill!) to the heart of Chiado.
We were met on schedule by the owner, and given a warm welcome and a few hints about where to eat locally. A complementary bottle wine was a nice touch too.
About the house itself: it as it looks in the photos - small and compact, with everything you need for a few days away. I would highlight two things though - one the owner can do something about, and one they can't - the mattress probably needs to be replaced, as it sags in the middle and doesn't really give you a good night's sleep; and the noise from outside was quite loud, even there were no rowdy crowds gathered - must be a question of insulation of whatever, but it was a little uncomfortable.
Overall, I'd recommend María's place to visitors.