I am only giving this a three star since it is a bit heavy otherwise a great product.
Bought this before a trip and could get it quickly as I am an Amazon Prime member.. The features are good since if it is opened byTSA a red collar pops up around the neck alerting you that it has been opened. It is well made and solid however it is clunky  and heavy. If I had time I would have found one that was made of a lighter durable material with the same features.
If you are not putting it on a  bag you are carrying or have concerns about adding weight then this would be a great option.