The apartment itself was comfortable for 5 people. It's located halfway between the science centre and main centre so involves a fair bit of walking to both. Our host was very accommodating and friendly, and replied to messages within minutes. Even when we locked ourselves out, they fixed it immediately and did not charge us for the locksmith.
However, on arrival the apartment had not been properly cleaned - the floor was very dirty to the point we requested they re-clean it. The upholstery was stained and needed a deep clean. The kitchenware was either very dirty or broken, although the spatula was replaced on request. Generally the utensils were looking worse for wear and could do with replacement. We found a cockroach in our bathroom amongst our belongings, but were told this was expected throughout Valencia. Although they were seen in the streets, we did not expect one in our apartment seeing as all the doors were always closed.
Overall, we faced some issues but these could be resolved with a little investment into the apartment. We felt it could be a very nice place had this been the case.