just installed this, works well and saved me some time! I wanted a simple plugin to add CSS to pages and posts and this does just that.
Two small improvement suggestions:
adding an adjustable minimum capability for editing JS/CSS such as publish_posts, activate_plugins etc. as you may want editors to just edit content, but only admins can style for example.
a dropdown of css/js files in the theme to choose from, could even be limited to root of theme folder and a select set of folderrs if exists e.g. "includes/css", "styles" etc. (could even be user defined)