I have a tray with normal sheet and a Non reflective foil. For direct top view you can not tell the difference. In sidelight one sees with the antireflection film also something else if the other tray only the mirrored environment is siechtbar. There would then change the attitude position so that one ever again sees something while you can continue working with the non-reflective tablet. For the subjective impression that the reflective display would no longer be so clearly arises. With a TV, where you can not change the position, I would always prefer non-reflective. At a table, it rather depends on your own perception.
UPDATE: The seller has the service again resupplied a film. With a lot of patience and a very dust-free environment, I have applied this time the film with only minmalen inclusions. As noted above, the scope for applying is in the 1/10 mm range.
The film itself feels the use of class. Even with damp fingers slide this perfectly on the screen. Significantly better than no film.
Therefore, increase of 2 to 3 stars. With a little more tolerance for attaching the film, it would be a 5 star film.