I think this thread should be kept around. It's a shining public example of XPELs customer service quality.
My Model 3 is currently having Xpel PPF applied to the front bumber, Glassparency applied to all glass, and 4x coats of Ceramic Pro applied over the entire car. The shop doing it also does tinting, but they told me they won't do the back glass in a single piece of tint. Their reason is that they would have to order a 60" roll that would take too long to get rid of which is fine - it's their business.
Anyways, I've been shopping all day for a tint shop and reading online about which way to go with tint level and branch. I wasn't specifically looking for Xpel Prime XR+ until I came across this thread and saw Xpel's response. Since then, I found a shop nearby that not only will do the rear glass in 1 piece, but only uses Xpel XR and XR+ and they've done over 100 model 3s.