For all of you (me included) having issues with the stickers not coming off, that's NOT the screen protector! There are actually 3 layers of plastic, and the screen protector is the inner one, between the "front" and the "back" layers. The screen protector is thicker and harder than the 2 outer, flimsy layers. Ideally, when you remove the layer labeled "back", the screen protector (which is the stiff plastic) should stay attached to the "front" layer, then attach it to Nano's screen, then use the tab labelled "front" to pull off the flimsy sheet covering your screen protector. Work out the bubbles. It sounds confusing, but when you see one of these in your hands, you'll know what I mean.
On my first try, the screen protector stayed attached to the outer layer ("back"), and I assumed that the "front" layer was actually the protector. I then proceeded to attach it to the screen and then tried to remove the "front" label, which as many have noted here will not come off without leaving a mess behind.
Once again, the screen protector comes between 2 thinner, flimsy plastic layers (like a slice of cheese between 2 slices of bread). It's a much thicker and stiffer material than the 2 outer layers, and it has no sticker on it. Once I figured this out, the application was quite easy, and fit the Nano perfectly. I can't comment on durability since I haven't had it that long, but it's stuck very well so far.
I'm giving it 3 stars because instructions absolutely sucked. I was ready to throw it away, until I figured what was what.