Not sure what the OP means with regard to prompts. If he means prompts to say what address, city, etc., they're really not necessary, since the full address (number, street, and city) can be spoken in one "string". Therefore it's not necessary for the system to ask for "Number", then ask for Street", then ask for "City".
That's a huge step froward from older systems (from most mfr's) that left you tired after entering an address search. It's great to be able to simply say, "1234 Elm Street, Boise" and have the system find it.
I disagree the system is crap. I've had cars from Lexus, BMW, Acura, Infiniti and others, and this one stacks up well. It is a little slow to digest an address string, but it seems to understand me well, which is more than I can say from many others.