Yes, agree, in that scenario (wanting to maximize regen) it's better to know when the max is being used. But the tradeoff is that in order to "coast" or minimize regen, you need to keep depressing the accelerator to a point (which is indicated in the speedometer). Incidentally, the Volt does have a mode for max regen - the "L" gear. In this case, taking foot off the Volt accelerator gives max regen, akin to the S. And pressing the brake in that mode is simply applying the friction brake on top of max regen. It's why the Volt's implementation is nice. You have the option to choose. In the S, you can choose, BUT, in the "low" regen mode, you can't ever achieve the max regen. Because the brake pedal only does friction. So, to summarize: Volt in either mode can achieve min or max regen before friction. The S can ONLY achieve max regen in the Standard mode. It can't be achieved in the "low" mode. Thus, the difference, and some people's feeling (me included) that the Volt's implementation provides greater flexibility. In the Volt, I tend to use the "L" gear on surface streets. And "D" gear on the highways. Another question that I've seen asked and sort of answered: when the S is cold and "max regen" is limited, does the "feel" change? I.e. when max regen is available and you take your foot off the accelerator, you get the strong deceleration associated with the max regen. When the car is cold and regen is limited and you take your foot off the accelerator, does it still decelerate the same, even though you aren't getting the same amount of regen? Or do you have to compensate with the friction brake when the regen is limited?