My pet peeve with Sync is they disable navigation input via touch screen when car is moving. Even when a passenger tries to enter it. Instead they force the driver to use their clunky voice-recognition to do this. Which is much more distracting.

But this is a minor quip compared to how MS implemented Sync Services. It's 2014 and they use a voice(!) line from a pre-registered cell phone to connect to their services.