I can say right away that this is one of the best and most expensive steakhouses in the world! Delicious meat, a huge selection of drinks. Usually the service in Istanbul is so-so, but this restaurant is a rare exception! Experienced and fast waiters, they know English well (which is very rare in Turkey!).
I especially advise you to take steaks from the AUTHENTIC GOLD collection, especially porterhouse with 24 carat gold (there will be a photo below). As a side dish, you can order grilled vegetables, asparagus or mushrooms.
You can choose the main hall, or you can sit on the covered veranda with a sofa and fireplaces. A free shuttle service can be ordered to the hotel (Maybach or Rolls Royce, a Mercedes minivan with a starry sky is provided for large companies).
The service is fast and unobtrusive. The meat is not premium, but of a good average level, cooking for five. Convenient location, private entrance to the grand bazaar.