I have this on my 15" 2017 MBP and love it. Of course it removes a very very very little "shine" from the quality of the screen, but I can't really notice the difference. I initially applied it because I was having some eye strain problem with the MBP, but after applying I loved how it looks. The screen, when off, seems to almost match the space gray of the MBP and I love that look. My wife didn't even realize I had applied it, I had to show her the webcam cutout for her to believe me, lol.
As for applying, I placed the bottom flush against the bottom hinge, which makes it easier to apply. There was no bubble issue, if I remember correctly, it's designed to be bubble free and I was blown away when I realized they were right, lol. It did take me a few times before getting it right, the hardest part was matching the webcam cut out and the light cutout. Best to do it under a light so you can see where the cutout is.