Great stay over the New Year's Eve week-end !
The Palacio is beautiful and Maria is a lovely and very kind host.
The place is clean and spacious. You will meet all kinds of lovely people in there. It's walking distance from two very busy and lively areas, yet, itself, very quiet and in an authentic area.
Small downsides - but that should be no halt to a stay in Sant'anna : in the winter, it can be quite chilly and the wi-fi is generally...quite fickle, a bit unstable, which wasn't always great.
Appart from that, nothing but good things to say ! :) I recommend the place.