The only reason why I haven't performed Capitulating Queens recently, is because I wore out my first set of cards. The effect has had greater reactions from people than I originally thought, as it is lovely to watch the impossible looking color changes. The trick starts out similar to B'wave, ( a selected queen turns out to be the only odd backed one), but continues to show ALL queens as different against 3 cards that change for the sake of comparative contrast. James Swain wisely chose to not only use different colored cards, but different designs as well. If I have a complaint about this, it's relative to my individual preferences-which is to intensify the color contrast of the backs of the cards. That's my thing, and I can probably invest in some decks to retool this if I'm in the mood to split hairs.
What I find especially nice about Capitulating Queens, is that the colors change one card at a time. In versions of 'Twist', card backs change more radically-shocking, which I like, but I appreciate the subtlety of transition in this routine.

Awhile back, I wrote some words on MLA about 'Alladin' by Dominique Duvivier- Alladin being a packet effect, where cards change backs and fronts, in an ultimately senseless, 'flashy' manner. That trick definitely seemed to lack a cohesive plot. If color changing card effects are your thing, Capitulating Queens, is way up there, in my view and experience.

The fact that Larry Jennings used this effect, along with 'Close up Illusion', (his two packet effects) only further motivated my purchase. Clear instructions, nice printing, plus presentational options. Even once you've learned it, it still might look impossible to you!