We stayed at Oasis for a week and it was simply lovely. The apartment was the perfect size for three people but the terrace was the best part. My daughter's favorite pastime was to lie on the hammock and enjoy the night sky. It is about a ten minute walk to Plaza Mayor and is situated between two subway stations, Tirso de Molina and Lavapies. Both stations have supermarkets near each one. Lavapies area has lots of Indian restaurants. At night time the area is filled with people, predominately Indian & African men and the occassional police patrol but we never encountered any problems. You can buy SIM cards at the mobile accessories shop a few doors down on the left heading towards Lavapies station. Right below the apartment is a fantastic ice cream shop that is very popular with local children and adults alike!