We stayed at Luis' place for 3 nights and were extremely delighted. Marisa (Luis' mom) was kind, helpful and always quick to respond. The apartment itself is beautiful and very stylish with a carefully curated design, it's perfect for a couple. It's located close to all the major attractions in the historical center, but still quiet at night as the bedroom is in the back / not overlooking the street below, so we slept quite well. Can be a bit cold during the winter as there is not a lot of direct sunshine, so we needed to use the AC for heating, but it worked perfectly. The only thing I'd mention is that the bed is a little bit on the soft side (in case this is important for you), on the other hand the pillows and blanket were perfect. All-in-all we had a 5/5 experience, would definitely come back if we visit Valencia again!