Overall, I like these sunglasses. They seem sturdy and feel relatively light while being well constructed. They included a gift offer with the product, which required your e-mail and a Facebook like. It was worth doing, although it resulted in multiple e-mails persisting me to write a review, even though I told them I was waiting for an opportunity to actually try them before reviewing (they were backup sunglasses for an upcoming vacation). But this minor annoyance was outweighed by my general satisfaction with the product.
I spend many hours a day in front of the computer. I just got these glasses and can already feel my eyes getting much less tired from excessive screen time. These glasses fit perfectly over my own prescription glasses. Not sure how they would fit over thick-rimmed glasses, but mine are very light and have no frame.Best sun glasses ever. Great quality.