OK, here is the skinny on Mastershield. I had a rep to my house and he explained that there are two different Mastershield products. Apparently, all of the BBB complaints stem from the original version sold in Ohio. He said you can recognize the newer one by the overlap at the seams. If it is the kind that just has straight edges with no overlap it is the original version that everyone complained about. The newer version has an overlap at the seams and works better. He said the newer product was installed on Tim Carter's house in Ohio by an out of state dealer, not the guy selling the original version in Ohio. Make sure your Mastershield has the overlap, if not, you are getting the one that was the source of all the BBB complaints.
If you are confused by Mastershield and their different products in different places, Gutter Helmet has a micro screen product now that looks the same.