Yes, with ds1 I was desperate for sleep. It didn't do much. A couple months ago I let ds2 play with it because it rattled. He bit off a bead :/ thankfully I found both pieces.
I drank the Kool-Aid and bought one for DS2 in desperation. He wore it for 2 weeks and it did jack shit except led to a LOT of moaning and groaning from DH that it looked terrible. I gave it to a friend