We just stayed at Luis&Nelly's place. It is very nice and clean studio. The hosts are very helpful. We asked for more hangers and it was delivered within an hour. The same for the garage keys.
Having washing machine with drying function was very useful and practical.
But the most important is the location. IT IS AMAZING! It is located within a walking distance to the city center, about 25-30 minutes walk, 7 to 10 minutes to the park, 25 minutes to the science museum. We also walked to the beach. It took us about 50 minutes. But you can always take the bus or the taxi, that costs 6 to 7 euros.
The building is very quiet. There are many cafes, restaurants, supermarkets and 24/7 pharmacy close by.
Overall we would definitly recommend to stay at this place.