I have a porta-privy by Outback that is the exact same as the round one in the video above.
Used it for many years, after throwing away the one that came with my PETT toilet.
The latter would take a bow in the slightest breeze, even when staked and guy lined.
The round one I had the zipper went bad, and it was not that spacious inside.
The Nemo only needs the four stakes at the four corners, no guy lines, and I have had it in some wind and it does not move with that rigid steel frame.
There are two stuff sacks, one for the frame, one for the tent, and the frame sack goes in beside the tent, so you end up with just one sack.
I would say it is about 32" long, and 8" across. not that big to carry in a rig.