The location is good, it's at a central point of the tourístic area. It's always open, 24hrs and has a large variety – you can try almost all dishes of Dominican gastronomy at this place and the price is fair. It's also a meeting point for locals.
Meet with locals and get a very good idea of Dominican gastronomy.
Try Mofongo (one order is enough to feed 2 people). Don't forgot to try the Dominican beer Presidente ;)