Flamboyance of Flamingos

A special birthday last week - no name, no age mentioned. Which card to make? Well, this lady and I just don't like the same things, so I was stumped. I settled on a Double Z Fold Card in a Box.
I stamped 16 flamingos and die cut 10 of them to make this card.
This is the reverse of the envelope -

Here the card is lying flat along with the front of the envelope

The card standing open...

I really quite liked the finished card, which is a little worrying since that means she probably won't! LOL!
What do you think?