We stayed in Belen's apartment for one month while visiting Valencia. As expected, the apartment is in a great location in a popular neighborhood with easy access to other areas of the city. We did a lot of cooking and found the kitchen pretty well equipped. The wifi is pretty reliable. The washing machine worked great. In general, we wished the apartment felt more like home and that the hosts put a little more effort into the furnishings and decor, all of which are adequate, but a little more effort would go a long way to making the apartment feel like a home away from home.
Belen meant us at the apartment for check-in, but we didn't hear from her other than that, which surprised us a bit, given that we were staying for a whole month. At check-in she told us she would come by in a couple of days to replace a broken TV stand, but we never heard from her. A couple of days before we left, we had to reach out to her to ask what we should do about check-out. But she was very pleasant and quick to respond to communications.
The major point that is missing from the description, and that we think is understated in other reviews, is the street noise. The apartment is on a corner where a lot of people gather into the early hours of the morning. At least Thursday through Saturday, there is a lot of noise (singing, laughing, arguing, etc.) until 4am. We live in a city with a fire station on our block, so we thought we weren't sensitive to noise, but we really found our sleep disrupted often.
Otherwise, we found the apartment nice and it suited our needs during our stay. If we return to Valencia, we will probably try a different apartment, but we are thankful to Belen, Anton, and Joan for letting us stay in their apartment.