One of them was closed, safe to say we went to the 348 in the Botafogo district, this one has a very nice large balcony to stand and see the people coming and going, the pancakes (reputedly famous) highly recommended by the staff were delicious! So we would highly recommend going to 348 and also ordering the pancake (but I forgot the name)
We went to Corrientes 348 near the pier, there are some attractions nearby to stroll around, the restaurant is very easy to find, you can see the scenery of the pier when you eat, try the sign dessert recommended by the waiter, it is particularly delicious.
The restaurant is beautifully ambient, there are many people waiting in line, we asked for a Brazilian beef that is said to be traditional Argentine cooking methods, the tray is very delicate, the weight is enough, there are two stores, we went to the pier, the one, the transportation is very convenient.
The food was really good and good value for money but the most impressive thing was the service, the staff were very gentlemanly and caring, making the whole atmosphere of the meal very good, if I come back, I must have missed the service attitude.
It is one of the best steaks in life.