Nope, nothing but aggravation from this product. Should work out of the box, but it requires that you jump through hoops and then still doesn't work. Can't get much help through online support because only the support forum is available. You'll get referred to the same 2 artciles when VSS fails. One tells you to run a command line utility and reboot the server, after which you get the same problem. The other refers you to Microsoft for info that isn't available.
Unless Veritas comes up with a fix for exchange backups and the Voume Shadow Copy Service, go elsewhere. You'll save more money in time than you will spend trying to fix a problem that shouldn't exist in the first place.