My wife's Lexus LX 470 came w/ a real nice navigation system w/ bluetooth technology. The Motorola RAZR is listed as a compatible phone for the Lexus unit. So we went out and bought 4 RAZR phones, one for each member of our family. After much frustration and many phone calls to Lexus and Motorola we got it to where we can make and receive hands free calls, but no ring over the car's speaker system and can't download the phonebook into the Lexus. Lexus blames Motorola. Motorola blames our carrier, US Cellular. US Cellular blames Lexus and Motorola. Sounds kind of like the MOFOCO doesn't it?!!!
I think that bluetooth technology when it comes to phones and navigation systems hasn't been perfected yet, so until they work out all of the bugs, I'm not going to waste the $500 bucks for bluetooth on my '07 CUSE.