Purchased the "maximum protection" ZAGG shield for my iPhone 4, which DOES include pieces to protect the sides and top/bottom of the phone. However, I am completed dissatisfied with the product.
1) The amount of liquid application material they send you in the tiny little spray bottle isn't nearly enough unless you can flawlessly apply all of the pieces on the first try (for those who've managed to do this, great job, but I had to apply and re-apply both the front and back pieces multiple times, leaving me with no liquid application material for the sides/top/bottom).
2. Contrary to the company's advertisement/claim, the application process IS NOT "simple". Sure, you can get the protection material to stick on the first try, but it is VERY difficult to make it fit even close to perfectly, especially on the front of the phone (screen); I became overly frustrated with the whole process.
3. As per the instructions, the "air bubbles" and "imperfections" will "work themselves out in 2-3 days"; wonderful, so instead of enjoying my shiny new iPhone in all of its glory, I get to deal with bubbles on the screen for three days. Sorry, I'm both OCD and IMPATIENT, I can't deal with this.
4. The corners began peeling on both the front and back shortly after I FINALLY got the material to stick correctly.
After messing with this stuff for an hour, I gave up, took it off the phone, and threw it out. Mind you, the company does have one thing going for it; before actually trashing the stuff, I attempted to rip it apart with my hands, stab it with a knife, crush/smash it with a stone, and, as advertised, there was no damage done. But, honestly, I am under the impression that the endless positive reviews on their site talking about how amazing the stuff is and how people will "never buy anything else to protect" their electronics are vasty over exaggerated, I'd put my money on the company writing a lot of those "reviews" themselves. The material is definitely scratch proof, but the application process is difficult and annoying and the material peels rather quickly. Moreover, it gives the phone a weird rubbery feel.
My advice: go with one of the hundreds of normal cases out there for protection of your device.