According to the announcements on the German blu-ray site, this is a Mediabook. (There is also a steelbook edition, but this "Limited Collector's Edition" = Mediabook.)
I opted for the steelbook, but I'd love to know the significance of the 3 Discs here. I can't find out if it's simply a DVD and digital copy of the movie, or a second blu ray of special features?
i watched both movies yesterday, and while i think i have to watch "enemy" a second time to get a little less confused by it, "polytechnique" was quite an intense watching experience and it catched me from the first minute, very well done as well!