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.
I gave 4 ratings because the purchase is new so I don't know how it will hold up. Also haven't tested it myself for fire or water resistance but it seems adequate. The material is substantial, not flimsy; zippers and hook and loop closures seem secure. The two extra smaller bags are a nice bonus!