Interface elements are sometimes in unexpected places or the layout is too squished or too spread out for comfort.
Interface is laid out following conventions to enhance usability and has an appropriate density for the medium and content.
Interface layout is flawless—no doubts about what does what, or where to look for certain actions. Alignment is carefully considered throughout.
Interface is designed with full flexibility in mind, and is not designed to be a “fixed size” layout. How the layout adapts to different amounts of content has been considered throughout.