Daniel C.
Yelp
A small restaurant that only opens for lunch, pay by kilo, with the reputation so high it is always completely packed. In my opinion, it's just too trendy and that's it. Food is fresh, not much variety. They serve same menu for years if not decades, including desert. Eating a little bit of almost everything will make you feel shocked when you realise the meal costed 75 reais alone, without drinks and service.
Juices are really fresh with several options, the mango mouse amongst the desert options is one of the high points of this place for me, with pieces of coconut inside sunk in a tiny cake. I would rather go to one of our popular juice houses in Rio to eat something healthy with a really fresh juice. You will also probably pay 10% of the price for the same satisfaction than going to celeiro restaurant (they don't even have a menu for you to browse what you could feel like eating, when even many juice houses have - read my review for BB lanches).
A final statement: I have been there several times before and was never impressed. I went there yesterday and stick with the feeling it is too expensive for what you get. There are tons of options around that would make you happier for you to have lunch, but maybe that's the place to go if you want to try and meet some Brazilian celebrities. Baring in mind the dress code is not formal at all, so you can get your flip flops and go without dressing up for a buffet style restaurant where you are going to pay a very high price for it.