With MobileMe, I used to sync bookmarks, contacts and calendars from OS X to iOS. That was my main use of the service, together with a little bit of Back To My Mac and Transmit bookmarks sync from the Mac’s System Preferences panel. I never really used iDisk because it’s terribly slow in the Finder compared to the “instant-on” factor of Dropbox; I never used MobileMe galleries to share photos with my family; I never configured MobileMe on a Windows machine. Like I said, it was all about sync of critical items between my Macs and iOS devices. And of course, I also relied on Find My iPhone to track and remotely lock my iPad and iPhone. But Find My iPhone has become a free service with Apple ID integration, so that’s not really an issue anymore, as far as switching to Google is concerned. To sum up, moving to Google’s sync services would require me to find new ways to sync contacts and calendars, and give up to the possibility of syncing bookmarks across OS X and iOS. Due to Apple’s restrictions, in fact, there is no way to install a third-party app on iOS that can automatically sync bookmarks on Safari over the air.