I stayed 45 days at Isidro's apartment, and had a great time. The place is really well located in the center of Ruzafa, about 10-15 min walk to Ciutat Vella. Tons of bars and restaurants around make it very convenient as well.
The apartment itself was very comfortable. The AC worked great, both bedrooms are very comfy (even though storage space is very limited in the 2nd bedroom), bathroom is stylish, and there is a washer/dryer inside the condo.
I would recommend this apartment to anyone staying in Valencia for a short or long term.