We already had the small rabbit run (which the bunnies were not keen on at all) and were looking for panels to construct an enclosure accessible from the door to our garden. As we had found the system that attaches panels together on the run really good, we acquired the double height playpen and together with the panels from the original run managed to build a 'fence' around the area that the bunnies can safely - under supervision - access and play in. They love it and much binkying has occurred.
I bought this to supplement the bits from the original single height roofed and floored Zippi pen, which consisted of mostly square panels. With this you get six long lengths and four single lengths (I was expecting 8 long lengths because I didn’t scroll through the pictures). They are building blocks and run clips and it doesn’t matter how you arrange them. It is an impressive non bending solid mesh panel. Anyway, now I’ve got a sturdier (divided) pen for winter indoor/ summer outdoor use and a low height association pen for inside the house, to try to bond my snapping bunny brothers. I’m really not sure how you would use it in its original configuration at all without extra parts.