There is a lot of negative talk about Zagg and their InvisibleShield in this thread. I've installed several of them and on various iphones and ipods, and I stand behind the Dry Install 100%. The wet install is an inferior process, please do not get the smudge proof, anti-glare front cover. I do not stand behind that product, and, in fact, condemn Zagg for its development. However, while challenging, the dry install is amazing and, by far, the superior InvisibleShield.
Before I continue, I just want to say that I know this is an old thread, but I want to update it based on the newest version of the InvisibleShield for those in search of a good screen protector.
The latest Dry Install does NOT have an orange peel effect on the front; it's just as its name says, invisible...well, almost. Unlike the anti-glare InvisibleShield, the dry install retains the iPhone's beautiful retina display. I cannot speak to the quality of the back protector on the most recent version because I have a slightly older InvisibleShield on the back, and, therefore, it, too, is invisible (no matte finish or orange peel effect).
I can completely understand how people could become frustrated with Zagg's products because the installation process can be quite challenging, especially if you've never put one on before. I would advise people to refer to installation walkthrough videos online, either on youtube or on zagg.com, before attempting to install the shield.
The first shield I ever installed was a wet application. The dry application didn't even exist on the market yet. I hated the wet application for these reasons; it's messy, you have to leave your device off for 24 hours, so you can't use it right away, you can still get finger prints on the adhesive side of the protector because your fingers are coming in direct contact with the adhesive side--you must constantly keep your fingers soaked in the provided liquid--its more likely to shift afterwards. However, with the dry application, your fingers never touch the adhesive side, it's a faster application, you can use your device right away, and it stays put once it's installed. You can still pull the dry application off and reapply it if you mess up at first, but only if you haven't fully applied it to the device.
Contrary to what other users claim, it is not impossible to remove all dust from the device before beginning the application. Use a soft, damp paper towel to clean the device first. Then wipe it dry with a microfiber cloth. Next, open a blank page in Safari to check for visible dust particles against the solid white background, where dust is most likely to be visible.
Watch some example install videos first (i cannot stress this part enough). Then begin applying the shield to your device. Take your time. If you need to pull it back off after you first start, do so--just don't touch the adhesive side. Try to scrape out all of the bubbles that you can with the squeegee. All of the 'micro bubbles' will disappear after 24 hours or so, so don't worry about those.
I will edit this post later with some photos of my iphone, so you can see what the newest dry install shield looks like.