Clioman, The three restaurants you mention.. Mangal, never been, never fancied it and took note of reviews a few years ago). The Brothers, great recommendation on this Forum, ate there last month, meal O.K. but nothing startling. Serkul 2. Had lunch once, put off by waiter picking his nose, never went back.
However, have eaten at many restaurants in Calis just a few I would give top marks to for food and service. The Calis Beach Restaurant, Casa De Mama, Bella Mama, The Nil Bar, Meeting Point and of course Georges, where we have eaten now for 10 years and it is consistantly good, great professional service, always cloth napkins (which I love a sign of a good restaurant) always excellent food, never had a bad meal there. They have had the same Chef, Hussain, for 7 years and we know him well and often compliement him on our meal. So, IMHO I would say a lot of Restaurants in Calis give the same service you have received in Rosemary.
However, we will try Rosemary in September and get back with our review then, but we will not be judging it by the steak.