We've seen both Mystere and O in Las Vegas and they were very different shows. We've not seen La Nouba at WDW, but I would like to some day. No, they aren't Disney, but they are very entertaining and different, as you know since you saw the Canada one. My rationale is that if you've been to WDW enough times that you feel you have the time to "step outside the Disney box" and not feel that you've missed something in the parks, and there's nothing better to spend your wishes on, then go for it!