Hi all, just wanted to share that we had our interview on Thursday for EB1 and were approved! After having our documents checked and finger prints scanned we were called over to speak to a consular officer who asked us about our marriage status/if we've been married before, how long was our longest stay in the US, what my husband did for a living and if our daughter was an American (she is, hence not on the application). The whole thing took a little over an hour.
Also, for anyone who needs to reschedule their appointment - it was very difficult to get a straight answer on how to do so, so thought I'd share the steps. Be sure to register your appointment following their directions. Then, believe it or not, simply do not show up for the appointment and 24 hours later you will be able to send a message requesting to reschedule and giving your reason for missing the appointment. After they reply to your request you will be able to select a new date and time on their online system.
It's been four long years and just so grateful it is over! Thank you all for the sharing and support on this forum. Wishing everyone swift and successful interviews!