What is it like to use a VoiceXML application?

Here is an example:

Computer: Welcome to Joe's Pizza ordering service
Computer: Select pizza size from large, medium
          or small?
User:     large
Computer: what number of these pizzas do you want?
User:     two
Computer: Select first topping from mozzarella,
          pepperoni and anchovies?
User:     mozzarella
Computer: Do you want another topping, yes or no?
User:     yes
Computer: Select second topping from mozzarella,
          pepperoni and anchovies?
User:     pepperoni
Computer: Do you want any other pizzas, yes or no?
...