[olug] SuSE OpenExchange

[Ryan O'Rourke]

Has anyone out there implemented a SuSE OpenExchange server as a
replacement for a Microsoft Exchange server? 
We're looking at doing just that but I'd like to hear some firsthand
experiences first.

Is it possible to replace a MS Exchange server in a weekend? In a day?
In a few hours?
How simple was it to migrate email from the MS server to the new SuSE
server?
What about migrating all the contacts, address, etc?
What have your clients said about the migration besides the usual "old
dog, new tricks" complaints? 
How well does the SuSE server and browser-based suite stack up to the MS
solution?
What about using OpenExchange with Ximian Evolution/ Ximian Connector on
a Linux desktop? Does that work?

Thank you.

-- Ryan