The best thing about this software is its reliability, it has been able for me migrate many accounts in less than 30 minutes without any major issues or errors that I have faced so far! This product also provides backup services which makes my work easier as well when performing backups due to some critical data loss situations like emails deletion etc., So overall not much dislikes with regards migration but would love more support options provided by them instead if just 1 option then we can surely consider upgrading our subscription plan!! My organization uses notes email service mostly within office 365 environment mainly because all other environments are too difficult while migrating large number o records using existing tools available out there such us IBM's Xirrus Migration toolkit among others.
It really helped reduce time taken during account recovery after disasters caused eby system crashes/malfunctioning systems where users couldn't access their mailbox anymore even though they still had active subscriptions. ! And yes i am currently working at an IT infrastructure.