I used it before on my iPhone 4 and I must say that the surface is good. Easy enough to scroll, pinch, and swipe and there is no 'sticky' feel like the crystal version. Personally I didn't noticed any effect on it towards the screen clarity. If you browser through iLounge forum you'd notice that most people recommend PowerSupport as well. Though I'm now eyeing on moshi iGlaze for its ease of application.