I was going to buy an M-Edge cover for my PRS-300, but never got around to it. This past weekend I had a sudden urge to read outside and I happenened to have a 40% off coupon for Borders, so I went and bought the Sony cover with light. I still have a Book Armor case for a PRS-505 that I accidently broke a while back in a fluke accident , that was the 2nd PRS-505 that I broke

. The Sony cover with the light fits within this case perfectly for carrying in my backpack, or carrying to/from anywhere including when I get up to go from my couch to my bed. Yes, I'm being VERY careful with this reader.