If you have training materials for your company, I would highly recommend changing yourself to NextGen and updating all the training documents before you switch on the new UI for others. We also switched on one country at a time, so if you group employees, that may be a good way to roll it out. We had so many Concur users, we didn't want our helpdesk overloaded with calls, so rolling it out slowly worked best.
Jessica
Travel and Expense System Administrator
