I have it and voice directions is one option you can choose from. I think its pretty cool myself. The software as a whole is pretty neat and very useful, if your trying to find something and you're not quite sure the name of something. It has diff categories like "going out", "dining out" and even a category for health related things like dentist office, etc.
It also saves addresses you input so you don't have to keep re-typing them and you can set your home location, so it'll be the default whenever you look for directions.
I say its worth the download.