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 first umbrella was defective! When we pressed the "open" button, the whole umbrella shot off like a missile, barely missing a valuable lamp! Is this the idea behind the old superstition to not open an umbrella, indoors?!? We returned it and got the same umbrella which works PERFECTLY!! And we ordered the same umbrella in blue and in black!!