The software has allowed me to migrate large amounts of mail from one account (Exchange 2010) for archiving purposes with minimal damage! I have not found any issues or problems at this point in time but if you do run across anything please contact support asap so we can find out how it was resolved - they are always helpful :) My migration project is nearly complete now!! Very pleased overall because there were no major setbacks after testing for more than 2 months before deployment; however, some minor features could be improved upon/tweaked slightly/made better looking-wise which would only increase their usefulness / value when used by other people who need them.