Maria was truly welcoming and very helpful. The apartment was exactly as described and as seen on photos. The house (with a lovely little garden) was situated in a nice neighborhood (Marquês) and not too far away from the center. During our stay we barely used public transport.
So, all in all, I recommend the apartment and assure that Maria is a very nice host.
If anything, I'd "warn" people from more northern countries who are used to heated houses (with rather dry environment): it might feel a bit damp, especially, when it is raining outside.
Also, if you plan to cook something, take into consideration that there's no seasoning nor oil etc.
Nevertheless, our experience was good :)