Overall, this property is well situated for exploring Valencia - close to the train station as well as within walking distance to the lovely park which runs through the city and to the Palace of Arts etc. Good wifi also.
However, there were a few basic issues with the property. On check-in we were greeted by a Spanish woman and before we'd even really had a chance to look around the apartment she was asking for a 15 euro cleaning fee. I gave it to her without any fuss and she swiftly took off. But on closer inspection of the property we noticed that the bedsheets weren't clean. There were hairs and stains on both the sheet and the pillowcases. The very least I expect from accommodation is clean bedsheets so I was disappointed with this, especially after just handing over the cleaning fee. Luckily we found a great shop nearby that sold bedsheets, pillowcases, blankets etc. We also picked up a few other things in the shop (basin for the sink, bath mat) as these had either not been provided or were dirty. This cost us 27 euros meaning we were an extra 42 euros for the apartment (incl. cleaning fee) in addition to what we had already paid when we booked.
Also, when we checked-in we weren't shown how to use the kitchen appliances and couldn't work out how to use the fancy digital cooker. However, Marilyn was very good at responding to our messages and eventually we were told how to use it.
Beware too of the grumpy old man who lives next door who was very rude to my mum! We sat outside in the nice courtyard to have lunch one day and read our books and he told us that the courtyard belonged to him and that we shouldn't be sitting there. There is no notice in the apartment saying not to sit there so I expect he was just trying to be unpleasant.
Another minor issue to watch is that there is no door handle on the inside of the front door. I'm sure I read this in a previous review, so it should really have been fixed by now. Makes it a bit problematic as you need the key to get out of the house.
I think if the hosts could sort out the above issues the apartment would be an ok place to stay for one or two nights if you weren't planning on spending much time in the property. However, as I was using it as a base for the Valencia marathon, I'd hoped for somewhere a bit more comfortable for sitting around in and the uncomfortable bed meant I was a bit sore on race day.