OK, Just got back from a 2500 mile trip. Here is my findings.
1. Zero cab noise. We were in storms and windy conditions most of the time and zero cab noise. I also notice when in truck traffic my truck handle better. Even on a two lane when on coming truck went by I did not have the head wind.
2. Millage was a constant 11.7 mpg in the past it would bounce around the 10 range. The last part of Interstate I even got up to 12mpg.
3. Bugs on bulkhead seem to less. As I mention before we were in rain a lot so the jury is still out but it seem to less then in past trips. We are heading to MI in Aug we will see.
Over all I'm happy with the investment and I have accomplish what I was intending to do. Good luck ART