Our stay in Cristina's house was amazing. Sometimes the water took too long to get warm, but it didn't bother us too much because Valência is so hot in august. The location was really good, we were so close to a lot of monuments of ciutat vella that we just walked. It was a little far from the metro but the bus stop was less than 5min away.
When we arrived Cristina received us herself and explained everything we asked.
The apartment is very airy and the fan above the bed helped a lot to sleep well. But keep in mind that the kitchen and bathroom can get hot.