It's pretty cool I suppose, but it just kinda feels like they're trying to be mainstream too hard. Hard to believe they'd bother with something like this. The "badass" factor is very high here...the artwork, the package design, the music itself. There's nothing wrong with that, but I don't feel like we're any better than when you had to import Divine Wings in a regular ole' case. Which brings me to my next point.
The only thing about case designs is that I like conformity. If I'm going to actually buy all the stuff (and I do), I'd like it to at least look impressive on a shelf, which is the only place an actual disc is going to be for an eternity starting the day after I buy it. With SX, you have the regular old CD cases (V), the dinky paper/cardboard re-releases (Twilight, Wings), and then on top of that the Odyssey SE with the extra song, a regular case with a sleeve over it. Already you have three different types of cases in a band with five albums. And now they're doing this insane PL stuff. I'd honestly prefer they just pick a case style and stick with it, even if it is regular.
It's really not that big a deal. Considering what they're going for with Paradise Lost, it's actually perfect for the album. I don't think it'd have worked well with any of their other CDs...which should say something.