I LOVE mine.....and they are NOT more expensive than getting two whole pair of glasses. I get a pair every year with transition, and a pair of sunglasses.....why you ask?
Transition lense do not work above like 95 degrees. Once it reaches 92-95, they do not get dark....and here that happens often, so I get both.
I've been getting transition lenses for years.
i think the problem is most people do not follow directions, ie when you get them, you put them in your freezer for 45 minutes, and then you take them and leave them in the sun for another 45, as this "sets" them.
If you do not do that, they never get real dark.
Anyway, I wouldn't live without mine
It is ridiculous to set a detective story in New York City. New York City is itself a detective story...
AGATHA CHRISTIE, Life magazine, May 14, 1956