My friend and I stayed at Aston's place for one night, and it was clean, well-located, and safe. Aston was communicative, quick to reply, and amenable to changes in our arrival time. Both bedrooms were comfortable and well-kept and had two towels each, and the restroom was well-stocked.
My friend is from Basque so we didn't need recommendations, but the person who met us with the keys was prepared with a map as well of the city to point out places to go. The neighborhood is non-touristy, safe, and easy to walk to all areas.
Overall it was a great experience and we would definitely stay again!