Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
I only carry it in emergencies, so the small size and light weight are excellent features. I've only got it out once, in windy conditions, so it was handy to have a belt to lock it down. There was enough space to fit over my backpack comfortably. I was very relieved to be able to pack it back in the tiny bag without issue.