We've recently had Scott and his team (Don & Nick) install films on almost 600 Sq Ft of our windows, many of which facing relentless north-west afternoon sun exposure. It had been a year worth of research on my part. In the end we decided to go with true and tried 3M for which Sun Solutions of the Upstate was the exclusive dealer. Specifically, we chose 3M's Night Vision 15 & 25.
These guys are knowledgeable and experienced. They did a great professional job - always on time or early, efficient and clean. Long term effectiveness remains to be seen but based on my experience with these guys I have no doubt that Scott will stand behind his products and workmanship. My wife and I are satisfied with the investment. If you are wondering about some sort of sun protection of your home as we were about a year ago, start by giving Scott a call for consultation.