I'll skip doing any kind of plot review since most are probably familiar with the movie. I've owned this on VHS, DVD and the collectors edition DVD as I'm a fan of the film.
Picked it up on blu since the price was nice and I'm really pleased with the purchase. The PQ is stunning and all the little details you might not have noticed really pop on blu-ray. The core DTS soundtrack was more than enough to rock my living room. I imagine hearing this in full uncompressed audio would blow the roof off. For 9.99 I would recommend grabbing a copy. One of the best sci-fi movies ever, IMO at a really sweet price.