Excellent
"I think they're excellent, although not perfect; I wish they transitioned to their clearest state as fast as they transition to their darkest state, although perhaps this is a limitation of the technology. They're all day comfortable. They're tough as nails. . . a 3 ton truck drove over them and crushed them into summer grass. They were mangled and no longer useable but they didn't 'break'. No shatter. Nothing. This is just incredible. They were about a year old and still fully usable."























