Five thumbs up!
I like the Bully Buddy safety device so much that I am going to order two more, one for my dog sitter's dog and one for a friend who also owns a Cavalier King Charles Spaniel. (I hope that I get a volume discount.) As suggested in the Whole Dog Journal's review of the product, if your dog is an aggressive chewer, use a pair of pliers to make sure that the chew is sufficiently secured in the device.