Depends what version they were running. MySync 1 and 2 are Microsoft based and it's my understanding these are the ones people are having trouble with.It may be the latest upgrades. I did three test drives in Ford and Lincoln hybrid vehicles, and saw the MySync in operation. It worked as it was supposed to at the time of the drives.
I half agree with that from my '13 Fusion Energi. Sync 3.5.1 sucked hard, lots of reboots/freezes and other strange behavior, but once the 3.6.2 update was installed it fixed everything like magic.. in my car anyway.I had a '13 C-Max Energi for 2 years that had the My Ford Touch (MFT) infotainment system. Should have been renamed "Mother F__king Trash" or something like that instead. The thing was soooooo slow, and trying to enter an address in the NAV was a good way to end up dropping some F-bombs. If it didn't recognize my voice commands for entering an address, I just used my phone's Google maps instead.
Pretty bad when you are sued because your system simply SUCKS.