In case anyone wonders about that new contacts feature: "Our new contacts feature can securely store your contact list on our servers. Adding Contacts to Garmin Connect allows you to use safety features like LiveTrack, incident detection and Assistance. Without Contacts, these features will be disabled. [..] Would you like us to add contact information that you have previously stored in Connect?"
On first view it looks as if your entire phone's contact list will be uploaded to Garmin servers, but "information that you have PREVIOUSLY stored in Connect" is something else. I tried it and it only uploads the single email address I have previously used for livetrack.