Wrapsol says its Ultra screen protector film is made from advanced high-strength polyurethane and it is thicker than some screen films and more protective. It has a dry application process and if you follow the instructions properly (read them carefully and watch the company's YouTube installation video.), it's easy enough to install.
That said, be sure not to touch the adhesive (you'll leave fingerprints) and be patient with any tiny bubbles you end up with between the film and the screen; they'll go away after a couple of days (Wrapsol says the film is designed to actively release any bubbles, though you don't want to get any largely dust particles trapped under the film).
The clarity of the iPad 3's display was not affected by this screen protector and I liked it a lot once all the bubbles disappeared. However, it is slightly overpriced at around $25 ($29.99 list).