We stayed here for a week in January with a dog. The previous review sums things up perfectly; we had a very peaceful stay but, without a car, we felt rather cut off as the dusty track wasn't easy for bike riding and the coastal path needed hiking boots for the 2 mile walk to Alcossembre.
One word of warning February to April is Processionary Caterpillar season - see http://www.abacoadvisers.com/spain_explained/life-spain/news/processionary-caterpillars-spain. These little blighters are a considerable risk to dogs as well as to humans and we would not recommend bringing a dog to the site when the caterpillars are on the move.
Despite the remoteness, we enjoyed our stay and the friendly welcome from the owners, but would probably not return.