First - the hardcover trilogy edition: 10/10
I love the size and the convenience of having Dark Empire I-III in one complete volume. The binding is great and the colors pop off of the page. This is the definitive edition.
Second, the content: 9/10
I consider myself an avid explorer of the Expanded Universe - but mostly I read the novels. I have read relatively few Star Wars comics, and for some reason I have avoided Dark Empire because I've heard hardcore fans complaining about the resurrection of the Emperor, and the whole state of the galactic civil war in Dark Empire.
I would liken this to Splinter of the Mind's Eye (an early SW novel) - does it fit in 100% with the rest of the EU? No. Is it a helluva lot of fun? YES. Read Dark Empire - it's a different flavor of Star Wars. But in a fun, classic way. Han Solo is perfect, and we get to see a new side of Luke that is thought provoking and sets up an epic story if nothing else.
Read Dark Empire, and buy this edition.