I have a Nillkin.... I got everything ready to go first hand... then I cleaned the screen then quickly put the protector on.... Being rigid, I pinched both the protector and the phone between my thumb and middle finger of my right hand, holding it just above the screen near the top (this kind of lines things up).... then I used my left hand to make sure everything was lined up correctly. Then I just push down with my index finger and work my way out, pushing out any air pockets.
There's a bubble on the bottom left edge near the corner, which, near as I can tell might be caused by a slight depression in the screen's glass, so the glass protector, being rigid, will always pull away. But the rest of the screen is bubble/line free. There are a couple of tiny bits of dust trapped in there, two or so, nothing noticable unless you are looking for them. But the beauty is that there's no bubbles around them, like I'd get with plastic.
I will never put a plastic protector on my screens again. The glass feels so much better and after 3 months, it's still clear as a bell and scratch free.