I have the ultra crystal version on my Thunderbolt. It fit exactly, went on smoothly, and seems to smudge about the same as the original screen. I suspect most people picking up my phone would not know I had the protector on . I'm very pleased with it.
One of the Amazon reviews for the Ultra Crystal gave a nice detailed explanation of how to apply, but I'm not sure it was necessary.
I had both the oleophobic and the ultra crystal. both were great, but the oleophobic scratched way too easily. I ended up replacing it with the ultra crystal and smudges aren't such a huge issue as I thought it would be. so I'd suggest going with the ultra crystal, no one can even tell I have a screen protector on.