Anti-glare:
- looks and feels nice indoors
- keeps the fingerprints away
- really washed out the screen in sunlight though, I had serious trouble using it outdoors
- awful, AWFUL moire pattern over the screen, especially in areas of plan white like on, oh say, a website... photos looked awful, all noisy and gross
I had to remove it after about a week because it was just so damned annoying looking at the distortion all the time. After a week with it on it was like I was seeing the screen for the very first time when I took it off.
Crystal:
- still get reflections, though I find reflections easier to deal with in sunlight that diffusion across the screen
- still get fingerprints
- no distortion of the image
- no drop in light transmission from the screen
I took the crystal one off after a few months because I kept snagging it on my case.
I just like the feel of the glass - it's different to what the crystal film feels like when you're browsing. Haven't used a screen protecter in months now. Hardly even use a case anymore for that matter.