First: Valencia is a wonderful town. If you think about going there - it's definitely worth a trip. Or two.
Secondly: Claras apartment is ok. To summarize it up I think OK is the right wording. I've been in much better AirBnbs, but if you're searching for a flat I the middle of Valencias living-area you are at a good spot. Neither the old-town, nor the beach is close but the public transfer works pretty good and the bus station is just downstairs. Additionally there is a privat parking lot which is great.
The flat is...let's say...expedient. To me it seemed a little bit loveless. In the sleepingroom there is a weired plastic underbed on the bed. So it felt a little bit like sleeping wrapped in a shopping bag - we went to the sofa bed in the livingroom to sleep. Also because there's the controller for the air condition. Unfortunately the AC turns down every 30 minutes and you have to turn it on again manually. Yes, every time. So it was even kind of practical to sleep there. I asked Clara for help and after a week apparently a service-guy showed up. But nothing changed. Communication with Clara went well, but a woman called Pepa was there to give us the keys when we arrived. We never met Clara. It was nice, that we were allowed to check in earlier as our flight landed in the morning. Thank you!