Easy to install, and it works very well. You forget it's there until the weather gets cool enough for your breath and condensation to fog your face shield... then it doesn't! Nice clear additional lens. Kudos to Pinlock! On their website they show the helmet manufacturers they have worked with to get it right. I recommend this product.
Pete
This item is as described and keeps the fog off of my face shield. I would have given it 5 stars but the reduced field of vision knocked it down a bit. I just wish that it covered more of the shield. Minus that, I do enjoy having it.