I brought a few screen protectors on ebay and one of them was slightly bent so when i put it on my screen it showed a bubble which was pretty ugly. so then i put it on the back of my playbook and now you cant really tell (since its black) there is any dots or dusts marks and it works great to protect the back of my playbook (rather than throwing it out). Just wanted to share!
yup just dont peel it off.. also found a neat (guess pretty intuitive trick) use a hole punch to punch out the hole for the camera (although to me it makes no big difference..) but if you're that kinda person thats what you can do