First off, we loved the space. It was very stylish, with exposed old brick revealed in spots behind new plaster (very tastefully done). There was a very nice loft space, with a second double bed, should you have more than two in your party. There is a relatively steep and narrow stairway, to the top floor, of this building. It was not a problem, for us, at all. However, someone with disabilities, or lacking in physical fitness should take this into account. We were met, at check-in, by one of the owners, who was extremely personable. Though my Spanish language skills were less than his English proficiency, we were able understood each other, without a problem. Thoughtful touches, like a bottle of cava (Spanish sparkling wine), water bottle for each of us, plus some mini prepackaged pastries and other items, were a very nice. A welcome kit, included a number of items which addressed kitchen and bath needs.
I would have given this apartment five stars were it not for a couple of things. First, the shower doors were damaged and wouldn't stay on the tracks. This frustrated our showering, since gaps would arise when they fell off the track (this would happened almost every time we showered). We were told this damage was caused by the previous guest and that new doors were on order. Hopefully, they will be installed before the next guest arrives. Then, the washer door latch was broken, so we were unable to wash our clothes during this stay. Our hosts generously offered to do our laundry, by my wife didn't want deal with this inconvenience. The hosts were going to have this repaired, but it wouldn't be looked at until our departure day. I trust both of these problems will be taken care of and that future guests won't have any problems here. As I noted, I would have given a five star rating, otherwise.
Finally, the location is easy walking distance (maybe 10-15 minutes), from the AVE train station, for those with carry-on bags, or roller luggage. Distance to the major historical sights are also easy walking distance, which is a major plus. For those wanting to take an excursion to the beach, the 93 bus stops, on Gran Via, only a couple of blocks away. This allows you to travel to that area for 1.50 euros, each way (you can pay the drive cash).
All in all, this is a great reasonably priced option, for those that want to be immersed in Valencia and it's culture.