Today was my first day with the Fog City insert. Its a clear plastic peice with adhesive around the edge. You pull your visor off and affix it to the inside of the visor.
This was a great day to try it out, cold and sprinkling on the way into work this morning. It was daylight (such as it was) when I left. I was able to keep the visor down the whole way to work, which is about a 20 minute ride. The Fog City insert seemed to do its job, I had a little condensation around my nose that made checking the speedo a chore but other than that it was OK. The view through the insert was a little bit hazy but it wasn't too bad. It was nice to keep the visor down the whole way, less noise and my face didn't get cold. All it all it seemed like OK.
On the way home was a different story. I left work after dark, it was pouring rain when I hit the road and it was pretty cold too. I kept the visor down but it kept getting foggier and foggier. On the freeway it wasn't so bad but when I hit the side streets the slight fog combined with the halo effect the fog city insert has naturally made me basically blind when headlights from the other direction were on me. I had to simply flip my visor up and take the rain right in the face, it was that or be blind.
When I got home I took a look at the Fog City insert and it appeared to have fogged up between my visor and the insert. So I pulled it off, cleaned it and reapplied it making sure I made a good seal all the way around. I'll probably try it again tomorrow butso far I'm not super impressed.