Maria Rosa's place was great! There were tons of local places to eat nearby. Also, it's right beside the opera house so you there's a lot of things to see within walking distance. It's a short cab ride to the beach but not really walking distance (about 9km). It's also a short cab ride to old Valencia and the train stations.
The place itself was comfortable and a lovely hub if you're planning a short or long stay. I would definitely stay there again.