What are the most effective methods for adjusting the pedal assist sensitivity on an ebike to achieve optimal cruising performance, and how do these adjustments impact overall efficiency, battery life, and rider experience? Are there specific settings or techniques that can help riders fine-tune their ebikes pedal assist sensitivity to suit different terrain, riding styles, and personal preferences? How do different ebike manufacturers approach pedal assist sensitivity, and are there any notable differences in their systems that riders should be aware of? What are some common mistakes or misconceptions that riders make when adjusting pedal assist sensitivity, and how can they avoid these pitfalls?