A surgical intervention was needed for the installation, with great care taken to avoid the glue going to wrong places (such as buttons) and sticking permanently. If you don't have a steady hand and experience, it's better to have someone else install it.
After many hours of trying, I managed to have only one bubble at one edge of the glass, but that's my fault. However, it's not easy to have no bubbles at all on the edges!
It fits perfectly with ringke fusion x cases, and the feeling is like it's the actual screen of the phone.
(You need a UV lamp for the glue to bond, it's not included in the box.)