It would be nice if there was a little bit harder pressure section at the end of the pedal travel that disengaged it, so in situations where it's dangerous to be artificially limited in speed (such as overtaking another vehicle) there's an easy and intuitive way to disengage it that's normal behavior. Stomp on the pedal for speed and no limitation present, gently press until higher resistance section of pedal travel (which should feel a bit like the pedal being entirely depressed) and it works as advertised.
I know Mercedes often have that extra resistance level, since I've relatives' Mercedes some (I don't know if it function in cruise control or speed limiting in any way). I always found it annoying, because it came with what felt like a lagged and softened engine response until you utilized it. That just made the cars feel like they had two modes when starting from a stop sign, too slow or too fast, depending on how hard you pressed. :/ Perhaps I would have adjusted better if I drove one for more than a couple days.