Good food, but the location is awesome
The food is very good, no doubt about it. Turkish/Ottoman cousine...
But, the view is probably better. Looking at Bosphorus... Big mosques and Topkapi at the distance, on the right; Ortakoy Mosque on the left. Make sure you stay till after sunset. there until it's dark.
Look for the 'Saltanat Kayigi' that may float by, carrying tourists.
Also you have a pretty good chance of seeing a wedding that will probably take place inside and part of the garden.
A bit on the expensive side, but location, location, location...