Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not a safe product!

While they claim this product has been crash tested, there are no US standards to which it must meet. In a crash, if the Mighty Tight breaks, all the seatbelt will be released creating a very loose seat at the one moment you need it to be tight. It has also been known to sever and/or damage seatbelts. If you can't get a carseat tight without belt tightening devices you either have a seat that is not compatible with your car or you are not installing it correctly. Belt tightening devices should never be needed.