I also ordered the StickIT from eBay and I received it on Friday. Yowza is right about the tiny air bubbles. I tried my hardest to apply it perfectly, but there always seems to be a ton of tiny air bubbles on both sides of my nano. When I woke up Saturday morning, the number of bubbles drastically reduced and I'm assuming most of the bubbles will go away soon enough (there are however some bubbles that won't go away since a speck of dust got trapped under the StickIT before applying. I'll probably try to reapply again to make sure it's dust-free). This product is one of the only ones offered that protect the sides of the nano, but the result is a rather uneven seam down the back of your nano where the two sides of the vinyl meet.
This product does it's job by protecting the nano. I've actually not taken my nano out for the past 2 weeks because of the fear of scratching, but now, I feel that I can. This product is not the best though, because it seems to me that the corners of the back might be susceptible to peeling off when being handled roughly or constantly being taken in and out of your pocket. I just rub the end of the vinyl back down when it starts to peel off. This is by no means a permanent solution for me (I'm still waiting on my nano tubes), but the product shipped fast and it does prevent scratching, so I'm using it for now.