Steinheil. I have it on 3 Bionics. Once on, you don't know it is on. It is clear and smooth. It resists scratches well. They are easily to apply if you take some simple steps. First wash you hands with soap and water to get rid of skin oils. Then wipe clean the screen. Apply from the top of the screen to the bottom slowly. Most importantly apply in a relatively dust free environment such as in the bathroom after a shower when there is some moisture in the air.