There is the initial disclaimer when you turn on the RNS-E, that's gone with US sw 0150. There is also a displaimer when you try to enter an address or phone number, that's still there but not as annoying as the other one.
And the second disclaimer is only there if you try to enter the data while you are moving. I hope you don't do that anyway, and if your passenger is doing it, it is not a big deal to press one more button, IMHO.
When you first insert the 2007 North America DVD, the RNS-E will recognize the higher software version and begin the upgrade. I believe there were two restarts and then you have the new functions (ie mute) and disappearance of the warning screen.