Ok, did not get to watch the whole thing, but skimmed through a bunch of my favorite parts. It certainly is an upgrade from the LionsGate disc, which is probably the most pathetic excuse for a BD I've ever laid my eyes on. The biggest improvement here is the TrueHD track. Only 16bit, but IMO the DTS-ES track on the US BD was kind of wimpy sounding. LFE is much stronger and tighter here, and everything just sounds so much better. The video is an AVC encode and averages 27-28 mbps. It's nothing too spectacular, probably due to the source material, but still a strong upgrade from that horrid US coaster disc. The beach massacre looked especially sharp to my eyes. I wasn't blown away, but some spots impressed me.
In terms of extras it has most if not all of the ones from the original DVD release (haven't had it for a while, so I can't remember), and the animatic alternate opening from the extended cut.
Overall, if you are a fan, you should really pick this up. Throw the Lionsgate disc in the garbage ASAP, and grab this. It's probably the best this movie can hope to look and sound for a while. I'm very happy I imported it in.