We did a big day at International Entertainment Consulting (lead by Tony and Thea Cochrane) today migrating their current Google Apps system to Microsoft Office 365. Office 365 is most probably the best all-in-one mail, calendar and contact syncing system around today. It works so harmoniously with all systems and client software to ensure that everything syncs effectively and efficiently. Furthermore it gives a full subscription to Microsoft Office (Word, Excel, Powerpoint, etc.) on both Mac and Windows platforms.
We used MigrationWiz to migrate all mail and it did 8 big accounts within 1.5 hours. Migration Wiz and Office 365 are two systems that I can highly recommend and completely trust based on experience. Well done to both companies!