I am currently test driving these.
They are a two week lens and have photochromic properties.
The vision is very sharp and contrast is very good. The change in tint is quite subtle and they do not fully darken like sunglasses. They are however very good in sunlight and provide a good level of protection from strong sunlight and prevent uncomfortable glare.
There are no issues with moving from outside to inside and you are not left blundering in the dark waiting for them to clear !
I do have some reservations about re-useable lenses but ill give this some thought. Not sure what the likely lowest retail price for these might be.
I wonder why they dont produce them as dailies? Probably marketing/economics?