@RenewedRebecca I love the convenience of mine and would have a hard time going back. That being said, the following negatives are something to take into account. 1. They aren't terribly fast transitioning, especially from full sun. 2. They don't quite get dark enough to replace sunglasses on, say, a sunny day on a white sand beach. 3. Performance degrades over time and has a life expectancy of about 2 years.
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