Joking aside the orange key thing for me has proved no different to the black key.
The height difference between my Wife and I, at first thought would cause a problem, however just just set each key to memory..
Follow the instructions, to set the key it must be placed in the lift up arm rest compartment, there is an identity mark in there where to place the key to program settings.
The seat moves to whats programmed like any other..
As for the speed restrict thing, I just set it to max speed, I think it only restricts if set, don’t set it no problem.
I use the orange key, always have..
?