I saw that picture when I was looking for ideas on how to make a cage. It looked so nice, but I decided against making one for a couple reasons: I didn't want to have to deal with putting metal zip ties or wrapping wire around the edges to connect the shelves and wide and long shelves can be pricey, especially if they don't have epoxy coating which I was afraid my chin would chew off.
But I still love the look of it. It looks so clean!! There's probably a way to make one that I would like, I just didn't want to spend all my time figuring it out!