Real Color Markers are recommended for hobbyists who are just starting out and for any experienced modeler who wants to paint details or apply small base coats quickly. They are not a substitute for paints since they do not allow for certain techniques like wet blending, feathering, dry brushing, etc., which are only possible with traditional paint.
They are ideal for creating hard-edge camouflage patterns, disruptive patterns, etc. The markers are extremely useful for painting details with great precision.