1: I liked how easy it was to open the packaging. How it always bounces back when something can't be opened.2: It's easy to understand how they work. Slipped right in and seems very safe. I liked the rubber as I can be hard on things, it should hold up well. 3: I personally would like a longer version. Like most older people, I sometimes wear 2 different pairs of glasses. I usually wear sunglasses most of the time, but when I need them I like to wear reading glasses around my neck. So I never have to look for her. I like my long reading glasses and short sunglasses so I know what's what. 4: Overall I am satisfied with them. I like that it's easy to use, they don't have to be difficult to install. They seem well made and should last a long time.
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