First, make sure you buy this at the Apple Store itself. I did a pickup order which apparently is limited to the home installation one. Ended up cancelling to get it installed in store.

They seemed to install it seamlessly on my 14 Pro Max with their machine, but after looking closely I noticed two very tiny pieces of dust in the corner and one trapped in the edge. They were small enough not to cause air bubbles, and the employee who installed it had to get another employee’s opinion as he couldn’t see it and said he used the sticker to capture all the dust. They said they could either swap it once using their machine, with no guarantee it will be any better, or give me a home installation one. I opted for the machine. Another employee did it this time and it was flawless (probably came down to how they applied the dust removal sticker).

I was reluctant to do this but also spent $40 and knew those little dots would bother me, especially since the last time I got one it was flawless. If you find any issues, have them reinstall a new one.