Sorry to hear some people are having problems with the Bluetooth and voice command option. I just recently bought a Journey R/T with the 8.4. I also had success pairing 3 bluetooth phones, and have to agree that the sound qualitly making a call is great and must be due to how quiet the Journey is. Just to add something I did not know, when I paired my phone, it also gave me access to my phones media. If I choose bluetooth as a media source, the touch screen or steering wheel controls the phones media player.
Hope those having problems get the issues fix. Enjoy your Journey.