I'm so glad you like them. I love mine. I tried lined bifocals but got totally freaked out by the line dividing my world in half. These seem so natural! It's been at least 15 years now. The only negative thing I've seen has been since my stroke and I really had to search. I read that our eye muscles might not get as much exercise because we're supposed to point our nose in the direction we want to look. Ie less use of peripheral vision while wearing the trifocals/progressives.