Outlook for Mac Sync to Google
Advantages: Your PC Syncs to DejaCloud, DejaCloud connects to Google, and Google Syncs to your phone. This is a great choice if you require your Outlook for Mac data in Google Calendar and Contacts for other reasons. CompanionLink for Google sync can be set automatically and will run in background on your PC.
Disadvantages: Uses DejaCloud as a hub. Direct Google Sync will be available in Winter 2016