We had a great time at Melissa's place. Andrea was very helpful and friendly, and responded quickly to any questions we had. The flat is in a great location, around 6-7 minutes walk from the beach, and right around the corner from a Mercadona. It's also no more than 10 minutes walk from the Metro. There's also a great tapas bar round the corner (Casa Montaña), and a great lunch place right outside (Ca La Mar).
The flat itself was clean and well-maintained, and was a great space for a couple to spend some time in Valencia. We were very happy with our stay.