We bought the ears when they first came out. Used them a couple times on that trip, but that was it. They're pretty bulky and not real comfortable to wear (at least they were, not sure if they've changed), so not something you could wear all day like a headband or normal ears. It was cool to see everyone's ears "glowing with the show", but that was back when they were new so everyone had them! I don't even remember seeing any or noticing them on my trip in April.
I probably wouldn't buy the ears again. The wand? I might consider for my niece on our trip in a couple of weeks, but definitely not the ears.