billchurch

First off Welcome Bill! 
 
The clay mitt is 'reusable' vs. the clay bar which must be replaced when it gets dirty.  But the clay mitt is more aggressive than bar.  Not a problem if you only plan to use it on glass, but something to consider if you plan to remove contamination from the paint. 
I would recommend picking up some Rinseless Wash to use as a clay lube.  You can easily go thru a 16 oz. bottle of Detail Spray on a whole car vs. a few ounces of Rinseless Wash (mixed with distilled water).

The windshield protection kit, plus Glass Sealant is an excellent combination.  I use the sealant about once every 3 months and then use the boost every few weeks.   The longevity of the sealant will depend on the weather, wiper usage and whether or not you leave the vehicle outside all the time. 
 
For the inside of the windshield, I use Brilliant Glaze, it absolutely works wonders and is a product you can use in many locations and for different surfaces. 

I use the glass sealant on my Model S windshield and never have chatter. For the glass roof, I purchased a glass coating (another company since Adam didn’t have one last year) but today, I would use the spray coating on the roof and b pillars to help keep those cameras clean. Oh, and a bit of glass sealant on the backup camera really helps too.