I have the 8.4 in my 15 Durango Citadel it doesn't understand voice commands,navigation gives me wrong directions and the kicker to all of this they sent me an over the air up date in which you had to load or you had no radio.After I loaded it the entire u-connect shut down and they wanted $60.00 to reboot something they caused.I called u-connect because I dealt with them from the beginning and got Dodge to pay for it but still doesn't work right but it's a little better.BTW they told me they had very few complaints about u-connect.