Funny. I do use the voice command to make telephone calls or play music on my phone. It works about 80 or 90% of the time. I've never used it for anything else.
The thing I thought I would use daily, HUD, I rarely use because I cannot see it through polarized sunglasses, and I don't drive at night that much. I think it is very cool, but I can't stand being blinded by the sun.