I bought a F900BT off of someone on a local forum, and the unit is running some hacked ebay firmware the guy got which ran a different set of maps local to where he was.
He swore up and down that the head unit "worked fine for him" however since I got the head unit the firmware has been anything but stable.
A few of the issues are as follows:
-Splash screen is only 1/2 the size of the actual screen. The image does not stretch out.
-Artwork from my Ipod does not display on the Ipod screen
-Voice recognition does not function. Pressing in the control stick causes the unit to freeze