Decent goggle, 2nd lens isn't great
Ordered the Ignitor Mirror lens and the extra lens is the blue sensor mirror. Neither of these seem to be mirrored - you can see my eyes through them. The Ignitor mirror lens worked really well for me in bright sun to partly cloudy days out west. It did not handle overcast flat light at all. So I switched out to the blue sensor mirror that came with it (designed for overcast days) and I saw zero difference from the Ignitor mirror lens, it was still hard to pick out snow/ice differences. Noticed there is also a gap around my nose that lets air in, which is great for keeping your goggles fog-free, but terrible when it's windy/snowing. The cut of the foam is also strange around the nose, so be sure to try it on and look down the front of your face. If you can see a gap (like we noticed only after buying), then likely you'll have the airflow issue I did. I was able to tighten and sit the goggles just right so the airflow was minimal. The profile is a bit flatter and wider (sticks out the side of your face), unlike the Giro Basis, which curves in significantly (almost too much) around my face.
Overall, a decent goggle, but for the cost, the 2nd lens that claims it's 70% VLT for flat light should function differently from the 35% VLT lens.