We came here for a long lunch during Carnaval; the atmosphere in the restaurant was great.
We ordered a muceca to share between four, it was incredibly tasty and really hit the spot. We finished with a banana fritter desert. There was a steady flow of 'caipirinhas' throughout the whole meal!
We had a great view right by the window, overlooking the sea, where many people order beers and sit out (as can be seen in the photo).
The only down side is the price, it is by no means the cheapest place to eat in Rio.