I was there a couple of years ago, and this year I brought a crowd, but we arrived at 4-5 o'clock, having specified in advance that breakfast was all day.
I was met by the most unfriendly cook (as he introduced himself) and told that the kitchen was until 5, after that only tea. In the concept of the establishment, unlimited food and tea. What's the point of paying 600 lire if the kitchen closes at 5? Fortunately, the rest of the staff was very warm, and the manager came up to us. The table was set properly. But I still have the sediment.
Thank God there are a lot of similar cafes and restaurants in Istanbul, there is a choice.
So I'll have breakfast with friends somewhere else next time.)
We were there once. We booked in advance. As a result, three people were seated at a table for two right at the entrance. Usually the tables located in this way are used for those guests who do not book, or guests are warned in advance. The food didn't make any impression either, with some exceptions. The breakfast itself includes only a limited set of dishes. The portions are quite small. Everything else is at an additional cost, so the cost of breakfast increases several times compared to dinner in the area.