I have about a 70% hit rate. Seems funny, but I set up a timer that goes off, to remind me that it has recharged.
Very few duds for me, which has been good. So far - 10 2k, 9 red bamboo divider, 7 dream ears, 4 5k, 3 infernos, then 1 yellow saucer. I finally got one of those.
It has allowed to me gift dream ears to a few friends and to a few random strangers. I saw someone talking to Yeti about dream ears, and how she really wanted one. I "listened" in on the rest of the conversation - when I told her to turn trade on and gave her a pair, she was shocked. It feels good to surprise people.