I've bought a few for my wife through Adam and Eve website. They always have promos where you get a few free items.
She loves when I get her off with her "favorite thingy" as she calls it!! She grabs the sheets and thrash as she orgasms.
Unfortunately she won't use any herself or with me, I've tried to get her to hold her favorite while I'm fucking her in missionary or just playing with her body so we can cum together!!! I've managed to multitask and it was amazing trying to stay inside her when she was getting off and made sure to tell her so afterwards while falling asleep naked afterwards.