First, welcome to the addiction, Mike! Be sure to go post an intro in the New Member Check-in thread...
As for BG on the windshield...best...product...hack...EVER! In the above video, Adam says he applies it about twice a year. But as with most products, your mileage will vary. It doesn't take much at all to do the interior of the windshield, so when the haze comes back, simply reapply it. What I can promise, though, is the sooner you do it, the happier you'll be!