I've had a few Fords from Hertz with BT but the most horrible Microsoft system. It's relatively easy to set up and it seems to connect every time you turn the engine on. That's the good bit.

Every time you turn the engine on the system, 20 seconds later, gabbles some command about something being off, but this warning is in computer-speak and doesn't mean a thing to me, other than irritates the heck out of me. I've made a mental note not to buy a Ford if it has such a system and not to rent Fords.