As far as reliability, I have major concerns regarding my experience with my 2011 Edge. As most have said, the SYNC system, when working properly, is great...However, even after numerous firmware updates, mine is still very unreliable. Constant reboots, missing data on the touch screen, and bluetooth that sometimes connects to the phone, and sometimes does not.
My most recent reliability issue was the door ajar light coming on, for the driver's door. My Edge is just our of warranty, so I was not pleased to have to pay the dealer $487.00 to replace the driver's door switch. Unlike most manufacturers, who use a $4.00 spring loaded momentary jamb mounted switch, Ford, taking a cue from BMW, integrates the door switch into the door latch mechanism, which requires total dis-assembly of the door, in order to replace the latch/switch.
This latest incident, along with the SYNC debacle has left a bad taste, so when the EDGE lease is up in a few months, I'm moving to a Jeep Grand Cherokee.