I have had the SGP Oleophobic on for about a week and I have loved it from the first day. The cutouts make it almost impossible to tell there is a screen protector on the phone at all. My coworker is all about ZAGG but IMO the ZAGG screen protector is horrid looking! The SGP looks and feels like the original glass--I still can't tell back from front when the phone is in my pocket and the back side is bare glass right now.
As for cleaning, I must admit it's harder than the bare glass to remove smudges. I have a bumper on the phone and the prints and smudges seemt o just stay around the edges unless I remove the bumper and do a "wet clean" of the screen protector. This however, is not enough to deter me from highly reccommending the SGP!