To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Bought it to do some precision cutting of cardboard and the 2 knives with replaceable blades constantly need to be tightened. I would have to stop every few cuts and tighten it. The first day I didn’t realize the blade was loosening and cut my finger as they completely separated on a long cut I was doing. Definitely don’t let teens use this as it is a hazard but it does cut.