Define comfort concretely
Comfort may mean a slower pace, private transport, fewer hotel changes or more time in each destination. A broad luxury label does not describe those choices.
Services must be named
Agree accommodation criteria, vehicle use, meal preferences and guiding individually. A photograph or a category label does not promise a particular hotel or exclusive access.
Keep the route balanced
Protect time for monuments and rest rather than using every free hour for another transfer. The confirmed proposal will identify which services are private and which are shared.