La Cabrera used to be awesome about 2 years ago..lol now it's just gotten worse and worse. I agree with a lot of the comments, the waiters just seem bothered by having to serve and even then the service is substandard (as is in most restaurants in BA).
I finally had great service at El Mirasol next to Retiro last week and their meat is amazing!! Amazing but expensive...
Siga La Vaca in Puerto Madero was 103 pesos for all you can eat steak...I love that place and at the current Blue rate it'll set you back about $16usd....that's a steal in my book!