When I first opened the package I thought this was a JOKE! It sat on my desk for weeks before I call your company to ask for a refund. You convinced me to TRY IT! So I decided what the hell, I’d better give it a try. I was AMAZED! What a difference! I can clearly see the my Garmin even when I’m wearing sun glasses in my open convertable. Thanks Glarestomper for coming up with this nifty simple device. I’ll be telling my friends for sure. Thanks again.