we bought the kittens personalized embrodiered collars on the theory that they were also most the same price as an engraved tag and tags can fall off collars, but if they slip their collor the tags are lost anyway. I think that I like them, except the underlying collar is kind of cheap. The break away is better than the stop gap collars we bought them, but connecting it is harder. I still really like the petco break away collar best, if I were just getting a collar.