Simple, cheap and essential. Bought these to use on my new Fujifilm Finepix HS30EXR and couldn't have asked for a more perfect fit.
Comes with a small square of lint free cloth to clean the original screen prior to fitting. Screen protector is a thin piece of pliable yet rigid plastic. A sheath of very thin plastic is positioned on either side of the protector with 2 extending labels attached clearly marked 1 (sticky side) and 2, so that it would be difficult to make a mistake when fitting. Simply clean the screen, start to peel off side 1 using the label, position the protector on the screen and using a stiff piece of card (or in my case a Bank Card - perfect size) smooth the screen protector into position as you continue to remove the plastic film. Once complete you can ensure it is firmly affixed with your fingers before removing the 2nd sheath, which protected the screen cover from any damage/scratches when fitting.
It should be noted that on my first attempt I didn't quite align it correctly, noticable about half way through fitting, so I simply removed it and started again, using the same protector. No marks from the re-peel and no loss of tackiness. Not even a hint of a bubble when fitting or re-fitting.
To be honest if I hadn't been the one to fit the protector I wouldn't even know it had one, as there is no impairment or distortion of the original screen. Perfectly sized so there is no overhang or shortened border around it. Excellent!