I put the Whitestone on mine back in December. Install was very intimidating and steps not clearly defined (though they may now package better instructions), but went fine.
8 months later, and it still feels great to use with perfect clarity. The oleophobic coating mostly wore off after a couple of months, but that is to be expected. There are a few chips in the edge from normal wear and tear, but none developed into cracks.
The only real flaw I've found is that after a few weeks some "spider webbing" began to form at the bottom, on either side and across the top of the speaker cutout - these are not any scratches on the surface of the glass - but they have not traveled upwards to where they impact the visible party if the display.
Only caveat of the lifetime warranty is (from what I've read) that there is a somewhat hefty handling charge for a replacement, about $16, that you have to also pay to mail them back the glass being replaced, and that glass has to be received before they ship the replacement. $20+ and being without coverage for a week or 2 definitely hurts the value of that warranty.
Still, all in all, best SP I've ever used.
Edit - the web-like lines are actually encroaching a little bit onto the visible bit, so I just put in a warranty request. The collected amount was $9.99, so it looks like that has dropped from the higher amount indicated in other reviews I had read. I'll update here as to the responsiveness and ease of getting the warranty replacement.
*Update*
I had never initially registered my protector (purchased it through Amazon), so had to do it through the site. It was simple enough, taking less than 5 minutes, but then had to go through an approval process for the registration, which took about a day. Once that was approved, I was able to submit the claim, but that again had to be manually approved, taking another 3 days. From that point, the replacement kit (which included everything except the UV light) only took 3 days to get to me.
In short, it's probably worth going ahead and registering the product when you first buy it. From that point, it looks like getting a replacement in the event you have an issue shouldn't be more than a week (and it's worth noting that included time of shipping from west coast to east coast).
All in all, very pleased with service.