I just picked up a couple Nillkin/Redpepper tempered glass screen protectors off eBay for $6.50ea. Nice packaging (despite the spelling errors on the box), and sturdy, unlike the one I ordered from China and came shattered. Comes with rubbing alcohol pad and microfiber cloth. Took a long, hot shower, then left the water going and applied the screen protector without a speck of dust under it (humidity keeps lint/dust from circulating in the air). The protector is exactly the width of the LCD, which leaves plenty of room for cases that overlap the screen edges. There's adhesive across the whole glass, so dust won't get underneath, unlike the XGear Fantom 4. No issues with touch sensitivity.
I like the durability of XtremeGuard, but not so much the rubbery feel, nor the fact that putting any case on will push the edges up and cause peeling. The dry application ones feel better, but are less durable against scratching. This is the first time I've used a tempered glass protector, and I don't think I can ever go back to other types. Naked glass just feels so much better.