Broke on first use. The chain, not the diffuser.
Good overall construction but the bracelet had let go and lost the diffuser on my first outing.  Bracelet was dangling from the shopping cart when loading the car and diffuser was nowhere to be found.  You can see the weak link in the chain that had let go.  Be sure to inspect it or replace bracelet with something more substantial and you'll be fine.
Rating: 4 stars