You get far more regen when you brake versus coasting. Of course the car has a very limited battery, less than 2 kwh, so it can get full and regen stops. If you brake as far ahead as possible you may not actually activate the hydraulic brakes until around 5 or 6 mph. Braking hard does activate the hydraulics which burns energy as heat and wear in the brake pads. In all cases, when you touch the brake pedal your stop lights come on. Careful driving and braking can make original brakes and pads last 250,000 miles, further saving you money that would have been spent on several brake jobs.