On newer Nissan LEAFs, a feature called e-Pedal lets you drive on one pedal alone; when you lift off the accelerator, the car applies regenerative braking. In most cases, this can stop the car completely without ever touching the brake pedal. Supporters say it can help make city driving both more relaxing and more efficient, while critics are unsure what it's good for and fear it will erode our traditional skills behind the wheel. It often covers such matters as driver adaptation, energy efficiency and the general driving experience. EVs are starting to feature it, but how well it works differs among models.