It's a very sturdy box, like usual Arrow limited editions.
As the photos show, it is, unfortunately, smaller than the Volume 1 boxset, it uses 1 case with 3 disc holders as opposed to volume 1's 3 separate cases, probably to save money. But just as great as volume 1.
I tried uploading the rest of my photos showing the interior, but I was told they were too big to upload.