Ultimate Sync: Apple, Microsoft, and Google

After struggling with managing calendars and contacts for a long time now, I think I finally have a system complex enough to be called a "system".  The same calendar in four places, and the same contacts in two places.  I get a calendar in my pocket at all times, and two choices for calendars when I have internet.  Plus, I have contacts in my pocket and on the internet. 

 And best of all, I get to use three software giants all at once ... what could possibly go wrong?