I support activsync devcies for a major software company and this thing is horrible. When I make changes on my Outlook calendar sometimes it can take an hour or more to show on the droid vs a few seconds on the iphone. Mail delivery is slower. If I let it sit idle the battery will be dead over night. I have deleted and re added the Exchange account etc. I am going to try it wo active sync for awhile see how the battery life is. Not to mention if you have a pw policy set in AS it will not work on the Droid and you can use it wo a pw. We allow unsupported devices at this time but that may change.