I went to a top notch xpel installer by me. I've had them do two of my Audis, and the bulk of their cars are 6 figure+ cars, so they know their stuff.
I will tell you a few noteworthy things.
First, they never use the precut film. They do it on the fly and it's flawless.
Second, xpel has specific vehicle packages. So they did the Model S package plus full rear bumper for me. They also did the door edges. it's the full front bumper, hood, and about half of the A-pillar (it stops a bit past the windshield. You can see the line where it stops there, but that's about it, and that's only if you look long and hard.
I've had it done on one red audi, and my last audi was white. It looks awesome on white. This time around they also did the ceramic coating. You can see the finished results.
Is it worth it? Definitely. Never had any paint damage. The worst thing that happened was a dog jumping up on part of my last car. Super nasty scratches. Warm water, went right away. Bird droppings come right off. Not cheap, but worth every penny to get done. Just get it done right.