"Great product"5.0 starson by GMCslizz
Pros: Great protection. Once on, it stays on. Relatively easy to install (if you take the time), or have someone at a Zagg cart do it for you. Lifetime warranty is awesome. Offer two varieties now (regular and HD), the latter of which does not dimple.
Cons: It is not a case (which sounds ridiculous to say, but it seems some people on here think it will protect the phone from falls). The regular one may dimple, creating a wave pattern, and has a rubbery texture (however, this aids in gripping the phone).
Summary: Invisible Shields are probably the best screen protectors around, and are available for a wide range of products. They offer great protection (e.g. Somehow my phone got a large gouge through the front screen, but luckily only my Invisible Shield was damaged, which was promptly replaced via the warranty).
If you take the time to install it properly, they seldom peel off or get bubbling (at least in my experience). Make sure to work in a dust free environment, wash your phone/gadget (with appropriate solution and microfiber cloth) and hands first. When installing it, don't be afraid to use too much applying solution, as this will be squeegeed out later, taking dust and air bubbles with it. Also make sure to wet your fingertips with the solution to prevent fingertips. Alternatively, get someone at a Zagg cart to do it for you (often found outside Apple stores in malls). Doing it properly will avoid later peeling around the edges as well, by ensuring that the entire shield adheres to the phone/gadget. Lastly, if the gadget is large (e.g. an iPad), it may help to have one person apply the application solution, while the other holds the shield to prevent it from sticking to itself.
However, this is not a case for your gadget. That is, it will not protect against falls, throws, bumps, etc., save for preventing scratches. Make sure to invest in a good case as well. Some cases are not compatible with the Invisible Shield (or any screen protector for that matter), such as ones which need to be tightly pulled over the gadget (and can thus cause the protector to peel away). Bumper-style cases for brick/slab style phones are a good option, especially ones that assemble in two pieces and ones that overlap with the screen protector (preventing peeling back around the edges).
I have used Invisible Shields for most/all of my gadgets with screens (or shiny parts) and have never had a problem with them. I recently purchased the Invisible Shield HD for my phone and love the product. The Invisible Shield HD has the same "glassy" texture as the phone itself, rather than the rubbery texture that the regular Invisible Shield has. This does give less grip to the phone though, which is dangerous, especially if you are using the Invisible Shield as a case.