Anyone tried SF3 and Spanning Sync?

Has anyone out there tried to sync SFDC-to-iCal with SF3 and iCal-to-gCal with Spanning Sync? If so, I'd love to hear your experiences. There's a lot of interest in syncing calendars between SFDC and gCal, and in theory this should be a solution. For Mac users. :-)

Regards,
Charlie
Spanning Sync