Ruzafa is my favorite neighbourhood in Valencia, and this apartment suited my needs perfectly, as I was staying for two months (jan-feb).
The location is great, right across Ruzafa market where you can get fresh produce, with LOTS of restaurants literally on every corner and supermarkets also in the same street. The city center is close enough to walk to everything you might want to see, so are most coworking offices, I recommend Flying Bean Café.
Lastly, the four rooms are separated so that it is convenient to heat living room or bedroom as needed, I never needed any heating in the kitchen or bathroom.
As a remote worker, this turned out to be great headquarters for my winter stay in Valencia. Thoroughly recommended.