I'm a recovering Outlook Addict. I used to rely on MS Outlook for all my email. Even for a few months after swithing to Google Apps I used Outlook for email and calendar. As my Inbox grew larger and larger, I got tired of Outlook bogging down and even locking up my computer. I finally decided to swith to the Gmail client and I couldn't be happier. I've found that people really like the Gmail client once they learn how to use it. The trouble is taking the time to learn how to use it. Hopefully this video from Google will help.