I disagree with some comments in the reviews here suggesting that this is something easy to do with a simple script. Simply setting a chron job with a sync script does nothing to check proximity, or when you synced last (thus avoiding needless syncing) and even if you could write something to do all of this, 6 bucks is a deal for the time it would take. Proximity sync worked great on my T68i as well as my P900 and gives me good flexibility to keep my stuff synced. I just set it and have forgotten about it since before I get into my office, most times Proximity Sync has already connected and synced my data. This is great for people with multiple macs and dotMac. it is set to sync again before I leave at the end of the day and I am always sure I have all my appointments and contacts etc. Good work Brad and keep it up.