We really enjoyed our stay here! My wife and I are on our honeymoon and stayed here for two nights (we spent two days here between stops in Barcelona and Madrid). The location is perfect; easily walkable to everything and the neighborhood is adorable. As others have said, travel light as the stairs are many to get up to this place but that didn't bother us.
We loved the balcony, especially at night. I hate to say anything negative, but the place wasn't very clean upon our arrival. It was very dusty, the towels smelled as if they had been wet but not cleaned and there were a number of ants in the kitchen. As we were only there two days we didn't want to make a stink of things so we just continued on and we're more than happy with the rest of it.
I wouldn't let my last paragraph deter you; Alba was amazing and so helpful and I honestly think the clean thing was just a one off. If we were ever to come back to Valencia, we would stay here again!