A great place for lunch is Omeraliza which is on Arzobispo Nouel near to the corner of Espaillat, opposite Adams Suites hotel. They do a Plato del Dia for 150 and most other options come in under 250. The food looks horrible on the display but tastes delicious. I would definitely give Pat e Palo a miss, it's way too expensive and there are much better value options. Buche Perico at the end of the Conde oppposite Segafredo has already been mentioned and the food prices there are actually very reasonable - many dinner options for under 500. Amazing setting. Don't go at lunchtime as they have hordes of tourists, but dinner is very good. Another evening option is Falafel in Sanchez, opposite Bio Bar. Beautiful courtyard setting and most things on the menu are 300 / 400. And another option is Jalao which is in the Cathedral square where Hard Rock used to be. Food prices are reasonable and it's a great atmosphere with live music and dancing most evenings. Pizza Colonial in Jose Reyes on the corner of Billini is also very reasonable, especially on a Monday when all pizzas are half price. Beautiful setting and proper Italian Pizza (owned by the guy who owns Segafredo).