We (my friend and I) stayed at Isabel's house for 10 days in June 2016, and absolutely loved it. It's been one of the best airbnb experiences i had. I would like to emphasize the following points:
(a.) location - is king, very close to shops, restaurants, cafes, transportation links and the seaside - all walking distance within 5 min. As the same time located in a pretty quite corner (we always kept the window open and never got bothered);
(b.) hosts - a sweet couple, both very educated and intelligent teachers; very friendly and easy-going. They naturally created a warm and pleasant environment, always very helpful in providing pieces of advice (travel, transportation, cuisine).
(c.) hospitality - a combination of the hosts, circumstances and other factors made our Spanish experience very special, in particular with the help of the hosts. Together we had dinners, we went to the beach, we went for a gelato in the middle of the night, we had Spanish lessons.
(d.) other matters, such as check-in, cleanliness, accuracy and communication - all these were at the highest possible level.
Overall, we are extremely satisfied with the stay. I believe that Alicante and San Juan wouldn't stick in our minds that much if there was no Isabel and Jesus, hospitality obviously is the key matter, which you can't always buy. I would definitely recommend this place to others and would love to come back one day.