Restaurants on the island are expensive, and most do not serve memorable meals. If you want something cheap, try Restaurante Sagitario ; or try the little joint that adjoins the minimarket Duty Free -- their simple comida corriente costs about $2 to $3 (£1-£1.50). The place is always full of construction workers so you know it must be good.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.