I had no interest in seeing this movie as I mistakenly chaulked it up to being just another Hunger Games/Twilight/Divergent/what have you teen flick. While it does cater to that audience, I heard nothing but good things about the flick and eventually saw it. I just happened to be in Best Buy a week or so later and they still had one copy left of their original exclusive (standard blu ray/dvd with slipcover but included a prequel comic book) and I snatched it up. I've watched twice since buying it and still love it.
Now, as far as the steelbook edition goes, unless you are an avid steelbook collector, it's not worth upgrading from the original release in my opinion. If you don't already own it then absolutely buy this edition as you can't buy the original best buy exclusive version any longer.
But the most important thing to point out, and it may have been corrected, but I bought this steelbook despite already having the original best buy exclusive as the picture shows the steelbook to say "unrated directors cut". First off, there isn't a directors cut of the film. Second, the steelbook doesn't actually have this printed on it in the U.S. and lastly, the reason it's even pictured is because (and you can verify this with a simple Google search, when this film was released in the UK, the edited the film slightly to obtain a 13 rating over a 15 rating. Nothing of merit was cut, just some dialogue, a scream or two and a fraction of a second or two of thematic elements deemed too intense for a 13 rating over a 15 rating. But if you saw it, youd be hard pressed to even identify the edits. Having said that, when the film was released on blu ray in the UK, it was released "unrated" in the original United States theatrical version we all saw in the US. So nothing new for the US, just for the UK. But like I said, youd be hard pressed to even identify the diffrences. So if you don't own it, go ahead and buy this steelbook, it's great quality and nice artwork. But don't spend more money if you already own it hoping to find some extended version of the film because it doesn't exist if you saw it in a US theater.