Got mine about 2 months ago. The iPhone 4 version I feel is nothing compared to when I had it on my 3G. The screen is now a dust and fingerprint magnet. Without the protector, the glass by itself didn't attract a lot of dust and lint. But luckily, I'm not the type of person who wants my phone all pretty (as long as the phone works) so no complaints coming from my end. Just pointing out the facts.
Don't know where your enviorment is, but I've used the anti-finger print version which is matte, and it's so good. It's hardly noticeable (some friends even complemented me because it was installed so well), and I like the style of the anti-glare. The screen is still sharp, but not as crystal clear, but it's certainly still nice. I'd doubt the cystal clear version would differ much, but I haven't tried that version so, I'm not sure about fingerprints, but dust gets a bit dusty in some public places, but it's one wipe and clean