We tried to go on our first night in Istanbul, as we had seen the Ottolenghi Istanbul episode, but it was fully booked, so we reserved for our last night.
The food did not disappoint, if you love Ottolenghi, you will love the food here. I only had vegetarian meze and loved them all.... Not in love with the desserts, however.
Service was attentive as well.
However, the atmosphere, although lively, is very corporate and snobby, so if you prefer casual dining, don't go here.
Not open on Sundays (in fact, most restaurants are closed then!)