First, let me say that if the phone is the main place where you see mail and
you are not used to sit down with a computer and Outlook for that, then it
will be worth the 120$ per year.

But there are some additional features:

- Out-of-Office agent setting from the device
- Fetch feature for downloading a single message without a full send/receive
- Remote wipe of the SD card (additionally to the device memory) if device
is lost
- Check who has accepted an Outlook Meeting Invitation
- Online Search for Mail messages at the server

If you need those, it is well worth it.

Helio