We have just completed a two-week tour in Oman, organised through Mark Tours.
Mark Tours can accommodate group tours, charter flight tours, and individual itineraries such as my wife and I have just taken. The itinerary they suggested to us was excellent, the guides they provided were knowledgeable and helpful, and the accommodation we chose with their advice was all comfortable. Additionally, they were patient in arranging a last-minute change of itinerary when we altered our plans.
All the items on our itinerary were completed satisfactorily and all the travel arrangements were seamless.
If you are looking for a professional and effective tour organiser in Oman, we certainly recommend Mark Tours.