... usually while driving.

That's the problem with this and every other UV adaptive lens treatment: Glass (like, for example, your windscreen) blocks UV.
So, they don't actually work when you're driving.

This is why I always get frames with clip on sunglasses with my glasses. Although, since I always end up losing the sunglasses part within a year, I'm considering just lashing out and getting prescription sunglasses.

I've got a pair that I had a friend bring back from a trip to the US. I love them, but if you're one of the genetic freaks like me who has a longer second toe, they can be a little uncomfortable. Mine have stretched to fit, but it took a while.
If you can, I strongly recommend you do a test fitting in a store before buying, as the sizes are not quite the same as standard shoe sizes. The guide on their website is pretty good and worked for me, although this guy thinks it's a bit off.

Also, one of the other toes is coming apart due to some dodgy stitching, but it's past the 90 days return and in the wrong country, so I'm out of luck with that.
(I seem to have had a run of bad luck with Vibram - the Vibram soles of my expensive hiking shoes have recently cracked across the middle).

I imagine everyone here knows New Voyages already.

I didn't, but I'm now downloading the first couple for later viewing.

Thank you for pointing this out - I've no idea how I've managed to miss it for this long.