Flavours, the 24 hour "multi cuisine" restaurant, has opened a second branch in the CBD area. Flavours' new location is right next to Supa Save, on the corner opposing HSBC and the Ruwi post office. This location most recently had a Thai restaurant which went out of business in less than one year and prior to that had a restaurant called The Arabic Oven.
While the CBD is Muscat's financial district, home to the head offices of most of Oman's big banks as well as the Central Bank of Oman, the Ministry of Commerce and Industry, the Oman Chamber of Commerce, and the Muscat Securities Market, it is not exactly a hotspot for restaurants and cafes. In fact most restaurants here go out of business. Even fast food. The last attempt to open a fast food franchise here was Subway which closed down 4 years ago. This is pure shawerma and rolled Arabic bread sandwich territory. And once the bankers and business people go home in the evening the area becomes depressingly quiet and deserted at night.
I haven't eaten at Flavours so I can't pass judgement. Read Amjad's review on the Omani Cuisine blog.
By the way are you aware that Muscat Municipality has recently renamed CBD to Hay Al Souqe?