I used Phantom Skinz for my Incredible and absolutely loved them. It comes with two in a pack (and I needed both after I didn't follow directions on first installation), and they will replace for free if something goes wrong (on second installation, I noticed a tear after putting it on and they sent me two more free of charge). I had it on there from day 1, for about a year and a half, until it was ripped off by a lesser-than-mildly-intelligent cousin of mine who thought I was stupid for keeping "the original screen protector on from when i bought the phone (I threw in this part because no one else would appreciate my frustration when this happened.
Anyway, screen clarity diminished only slightly when I used them and the slight rubbery feel actually was a positive for me as it helped when typing using swype. I would recommend them unless you don't like the wet application protectors. I had a problem at first with this, but after trying it, it wasn't so bad except the whole leaving your phone off for 24 hours.