Samsung launched the S Voice Drive app>, debuting first on the Galaxy S4. A standalone app designed specifically for the automotive cabin, S Voice Drive uses voice commands to place calls, play music via Bluetooth, send messages, and, of course, take you where you want to go.
I have typically found S Voice to be extremely slow and laggy. It's hard to gauge performance from my brief experience deep within a GPS-blocking building, but S Voice didn't feel as slow as in the past.
I also made the most typical demand that I could, asking for the phone to take me to Starbucks. I wasn't able to vocally choose which location I wanted by street name, a drawback, but there may have been some other way to voice my preference. Instead, I tapped.