I was lucky and got an upgrade to the Residence I Mirti Bianchi, the apartment was good, great location, close enough to the town centre to make it easily walkable yet far enough away that there's no noise in the evenings. Santa Teresa di Gallura is a great base to explore northern Sardinia there's a lot of small quiet beaches not to far away. on the negative side I went in October and as its off season a lot of the restaurants are closed and most of the tourist attractions.