I have not had any serious problems playing my iTunes media with SYNC MyFord Touch on our 2012 Ford Focus, except that sometimes the indexing seems to take longer than I'd like.  But I'm always game for a software update, so I tried downloading SYNC My iTunes from the SYNCmyride Support page. There is a version for Mac and one for PC. I tried the Mac one. It opened up without difficulty and modified my iTunes library items for optimized play on SYNC.  I didn't notice any big improvement in playing my iTunes library in the car, but it didn't crash it, either.  So I'll call it a qualified success and let you know if I detect any advantages to going through this process, other than the fun of doing so.