We went to Nene's on the recommendation of our cab driver (Rodrigo who is very gregarious) and reviews. It is a little hidden but our driver knew just how to find it. Most of us enjoyed our dinner - pork chops, arroz con pollo, and fish. One person ordered the Mexican tacos (against the recommendation of the rest of us), but the waiter seemed to favor it over the chicken dishes. It was more like a fajita than taco, but the beef was very tough. Someone did want to order the special, but because it came with shrimp (which no one wanted) and we had read the warnings about ordering the special because of the price, we didn't try it.
The service was very quick and the portions were large. They gave change back in US$.
Overall a good last meal for our trip to Arenal.