It really depends on the shape of your face, I found that it presses down on my cheek bones. I use a portable power pack and place it on the back of the head strap. That will give a counter weight while extending your playtime.
I'm not sure if I caught your question. This headstrap provides better balance so the everything fits comfortably without any fatigue over long sessions.
Not really, but you can lock the VR really tight on your face. But the pressure is not confortable. I prefer strap some weight on the back to deal with the tilt.