Good film, but slicer beneficial

The mumbi Screen Protector (Set of 2) I really like it very much.
However, I had to cut the opening for the camera about 1 millimeter prior to application on the side.
(A good slicer assuming that the film may include a protective film cut cleanly!)
Without cutting it can happen that the film possibly minimal survives and thus not completely "suck" can.
For best results, always observe the enclosed instructions. (Including dust-free environment)
Price / performance but overall good!