The attachment actually works perfectly, the material makes a very high-quality impression. Problems with blisters, I had none. The fit is perfect. The picture quality is nearly as good as without foil and significantly better than with the delivery sheet. The scratch resistance is okay, have now installed for a few weeks and it 2-3 small scratches, the old film was as sensitive.
However, what most disturbs me, and there is also the star trigger, the sensitivity for fingerprints. That's nothing compared to the pure glass, because you have to provoke the footprints already.
In addition, the delivery took a little longer than usual, but I can still see over time.
All in all a decent product if you can live with the fingerprints. The price is for 3 films with squeegee and cloth in order.