Currently before you send an email campaign or coaching email message in Luminate, you have the ability to calculate the audience list size, but no easy way to preview what those email addresses are before clicking Send. In making the switch from Sphere to Luminate this was our biggest surprise in terms of missing functionality, as we always made sure to preview email queries in Sphere before sending a blast. This was to check both that there were the appropriate number of addresses, but also that they were the right addresses.