BusySync 2.0 brings Google-iCal sync

Now which one should I get? BusySync or Spanning Sync? They both do the same right? Can someone make a review comparison?

You might also try Plaxo. It's free and syncs iCal gCal. I tried Spanning Sync early on, but had a bunch of reliability issues with it (duplicate contacts, deleted contacts). Good thing I backed up my calendar first. SS may be more reliable now, but it's still not cheap.

I think both BusySync and Spanning Sync charge too much for those of us who happen to use multiple Macs (work, home, laptop). Especially since this is a feature that's a no-brainer for either Apple or Google (or both) to implement in the future. The iPhone plays better and better with Gmail and Google Maps...iCal will probably do that soon, too, with Gcal.

I just started using Plaxo, so I can't say with 100% certainty that it's perfect, but if you back up your contacts first, it can't hurt to try...

Another free option is GCALdaemon... http://gcaldaemon.sourceforge.net/ But the setup, alone, is enough to scare off most sane people. How about a double-click installer and Prefs pane administration, GCALdaemon folks?

Been using the beta, updated to the 2.0 version, best $20 I ever spent.

@mr100percent: http://www.busymac.com/faqs.html implies BusySync replaces SpanningSync.

It costs a lot more than Spanning Sync. Spanning Sync charges $25/year per calendar shared, not per user. Our whole office syncs between iCal and Google Calendar for $25. With BusySync it would cost us hundreds of dollars.

I tried GCALdaemon just a couple months ago and it took me a little while to figure out it would not work with Leopard because of the way iCal changed not only the location (which I could solve) but the file structure and naming of iCal events. It could not work with Leopard the way they had it written. Maybe that's changed now but be advised.