We really enjoyed staying at Mari's villa. The house we stayed in was equipped with everything we needed, and it was really comfortable to sleep there (and wake up with the babblement of birds). The water in the pool is not over-chlorinated, so it was a real pleasure to swim there. The environment around is very calm and rural.
Mari and Pedro are really friendly hosts, despite the fact they don't speak English, we chatted somehow with the mix of Spanish and German, it was interesting experience for me. And their daughter, Aurora, helped us a lot, she was always on-line and replied pretty quickly. Mari also supplied us with sun umbrellas and a portable fridge, and I really grateful for that (the days were really hot and sunny).
The only disadvantage of this place is lack of public transport in the near, but if you are on car, this disadvantage turns to the profit - no tourist around, no city noise and just about 10 minutes to the city center.
I recommend Casa Gallo to everybody who wants to runaway (but not too far) from the city life and spend some days in the Spanish country-side.