I am using cb shine since last 3 years. First about mileage it is moderate, within city I am getting around 40kmpl, on highway around 55 kmpl. Maintenance is quite less as compared to other bikes, just require regular tuninin up and engine oil change is 2-3 months. Talking about stability is not bad on highway bike start vibrating after 65 km/hr speed. Braking system is working satisfactorily, it more suitable for riding in city. If you have many patholes that riding experience will be very uncomfortable.