Ford has had so many problems with the SYNC system that they have upped the warranty from five to six years to promote customer confidence in the system. They still haven't implemented the wi-fi, and when the did the last update, it fixed some things that needed to be addressed, but it also changed some things that worked well and now do not...
Mine will confirm the voice command and do something totally different from what it comfirmed "tune to octane" "tuning to octane" then the thing tunes to something like 890am, if it were not a woman's voice I'd name it HAL!
Guess that was a really long answer to say that yes, other people are having challenges with the system as well