The system works by analyzing the oil and your driving habits. When it detects the oil is suddenly much cleaner (oil change) it will delay the oil change service light accordingly. If you are very concerned or plan on keeping the car "till the wheels fall off" you may want to stick to a more conventional schedule of maintenance. Brake pads, various fluids, and other assorted parts still need to be inspected/replaced (as needed).
Hope this helps...Lee