Just had the Xpel San Antonio guys finish installing tint and PPF. They did a great job. I wasn't sure of their tint since there weren't many reviews on it, but I thought it looked great. Seems to do a great job keeping out the heat. I was really concerned about whether they can do the rear window with one film. They actually had a conference call with me and their VP explaining that they would have no issues doing it, however, when I arrived at my appointment, the installer said he couldn't do it and could only do it to the tint line. I told him, that's not what they told me and after going to the back, he came back saying they can get a special sized tint to do the rear. They did a fantastic job.
The Xpel XR tint seems to be great. Good enough where I'm going to bring my wife's model X in and have them tint the front windows. I was planning on doing photo sync again like on our S, but I find the Xpel XR a better value and can hardly tell the difference.