The glass pane (there are 2 pieces in the package) can be good, fit in position and possibly raise. With a fine plastic tool a little and slide perfectly into position. It is also supplied mounting hardware (to allow various cloths / tape to a dust-free assembly, but on the small screen with home remedies is no problem).
It should be applied no adhesive etc., the glass adheres very well on the screen. You see the screen protector course at closer look, because the glass is 0.3 mm thick, does not bother me personally but.
The feel is very pleasant - it's just an absolutely smooth glass surface. Clean with a cloth is easily possible without the disc shifts etc.
Conclusion: More expensive but high-quality real glass display protection. Recommended!