My three cents:
1. If the front is going to be silver, make the spine silver. Or both blue. I'm just a fan of consistency.
2. The "For superior sound and picture quality" line at the bottom of the front cover almost looks like it's cut off. Might want to move it up a little so there's a bit of a silver border.
3. The text on the back cover looks like it's running into the spine. The "d" on "instructed", especially. This seems to be fixed in Sluggo's edit.