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.
The lock is easy to program and seems very durable. Unfortunately the cover for the numbers falls off and won't stay on. It should have a built in attachment to keep it from falling off, and a better way to make it stay in place.