I came here on a Sunday afternoon for cheap eating about 1/2 mile walk from my hotel, Hotel Luisiana. For about $5-$8 you get a decent amount of food. I took my food to go, which I think makes a difference in Costa Rica. I feel that the food suddenly becomes bland/tasteless once you order "to go" (aka "para llevar"). Consider putting spices/sauce on the side before leaving the restaurants, whether you need it or not.
The servers appeared busy (although it was not crowded), so my "to-go" experience lasted about 40 min from start to end. In CR they don't provide plastic utensils/napkins like they do in the US so be prepared.
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