Yes, it's a little pricey, but get this: IT WORKS. It works beautifully, in fact, where others have failed. Seamless integration into the workflow. Now my Google contacts and calendar, my Apple address book and iCal and my Palm Pre are totally in sync.

I ran into some problems using the ap yesterday (4/09/10) and overnight to this morning (when I switched it to Manual sync only). The syncs would begin again within seconds of the last sync. I changed all my Mac cals (iMac, iPod Touch and iPad) to ignore events older than 30 days), turned off MobileMe, and even used the Start Over feature, then Replace Data on Google (which deletes Google data and replaces with data from my computer) -- all to no avail. All events on my Mac calendars appear to be OK, but Google is missing an event from yesterday. I would be cautious about this product. I also note others are having problems in the forum at the developer site. Great idea *and* I'd be cautious.

Spanning Sync gets rid of compatibility problems syncing that another comment noted, and has push from your Mac, and read-write calendars for your iPhone from Google. Besides, there's no reason to complain about the price, it's free, or even better, more money to you, after a few referrals. Spanning Sync is $5 off here: http://spanningsync.com/?r=WPU679

Snow Leopard does have google contact syncing but it still doesn't work for me. My last name and many people in my address book have spaces in their last name and google mangles these names. Google sees a name such as de la cruz as cruz and dumps the de la into the middle name spot. I've run into a couple problems, sometimes google contacts such as this will sync back to my snow leopard address book as a new contact or it will just reformat the name. So...Spanning Sync is still a needed app for those people who have issues such as these. Somehow Spanning Sync works around these issues.

sorry for the double post, I 'replied' instead of 'reviewed' :(

I used v1 and hated it but I've just upgraded to v2 and have to say it is pretty sweet!! I love the gmail contact sync, very slick.

price is still a little bit up there but you can get it for less with a discount code. I used GTMFRU and got $5 off so I only paid 20 bucks which seems about right to me for this tool.