I'm still with FTM 2012 and not confident enough to upgrade. I already had one broken sync in 2012, and I still haven't recovered all the work I lost. Besides, from what I read there don't seem to be any significant improvements outside of a 64-bit edition that will perform better on higher end machines with lots of RAM.
As for where you work with your linked tree, I don't think it matters anymore. In the early days of 2012 there was the suspicion in the user-community that making changes on both ends before synchronizing was causing some synchronizations to fail. Maybe that was the case. I don't know. At any rate, it doesn't *seem* to be the case anymore based on what people share about their linked trees that no longer sync.