This is very helpful in my organization where we are migrating from On Premise AD server to O365 which was not easy due to some issues faced during this process but now everything has been migrated smoothly without any issue or downtime so far!! Also it helps me create multiple plans according to different scenarios before starting actual implementation phase by using best practices provided via Microsoft training modules available online! I highly recommend anyone who wants smooth transition should use office 365 migration planner otherwise there will be lot many challenges while implementing new system at your end point.