I bought this because I always listen to audio books to sleep, and I am prone to ear infections, so the ear buds I use are counter indicated.
I think the device works really well if you're into white noise or music. Because I go for speech, I end up either having to crane my neck in funny positions, to make maximum contact with the pillow at the right spot - which means I wake up with a sore neck - or have it loud enough that my partner can hear it through my head and pillow - they asked me if I can hear the people talking outside the window.
Otherwise the product quality is great, really easy to set up, and does what it says in the box!
100% recommend for music/white noise snoozers.
95% recommended for solo room sleepers.
65% recommend for people who share beds/rooms.
If your house is louder than mine is, your hearing is better than mine, your partner's hearing is worse than my partners or your pillow works better for the conduction, it's still a great product!