Are you able to get biddirectional functions by upgrading to pro?

I didn't get 6xx because it wouldn't activate functions like engage AC compressor. It's that resolved with pro upgrade?

I think I may have answered my own question. The 680 looks like upgrade from 644 (discontinued) and looks pretty awesome. Double the price of nt510/520 but looks pretty nice at first glance.

The BT model I bought does everything the nt510 can do and more but it's $40/yr (first year included). The kludgy software will likely make it a one year experiment for me. The foxwell is very very very kludgy interface reminds me of Atari 2600 or DOS 3.0. I would love to have a tablet interface with 1990 or better visuals and human interface. So that seems to be impossible under $1000.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)