Once this product is on and protecting your iPod, it's great! But applying it is another story. It is cut to the EXACT dimensions of your iPod which makes it extremely difficult to line up perfectly and the more you try, the more frustrated you'll become. Unless you're very very patient, you'll unlikely be able to line it up perfectly and you'll end up with some parts that don't look right, but you should be able to get 95% accuracy. I gave up trying to perfect it after one hour, but it still looks good.
The back is the hardest to put on, but I think it's better than the screen protector because the back scratches more easily than the front.
The front is easier to put on, but it's still difficult, especially since you have to apply the home button part, then the little part surrounding it, and then finally you do the rest of the screen. Your protector will spill over the edges of your iPod because it doesn't seem to fit properly, even though it's cut exactly. You have to really press the edges down to get a smooth fit, but even then, it looks imperfect.
This product provides excellent protection and is nearly invisible - you can see it slightly if you look hard enough, especially on the front. However, it does require A LOT of patience to apply. If you're not patient, avoid this product.