Whenever I look at that red stamp on an envelope, I can't help but think of Super Smash Bros invitation letter! And she even said, "Could you take me with you?", which kind of fits...
I still have the Anniversary invitation letter. I have yet use it since I have all the ships that are available to pick at 120. Although, if I wasn't already married to Enterprise and have her at 120, I would pick her in a heartbeat.