Despite my frustrations this weekend, I still like the Porta-privy. Once you master it, it takes 30 seconds to setup and 30 seconds to put away. It worked great as a privacy shelter for the toilet and with the floor in it also worked great for showering. I like that it doesn't have any poles or other pieces to lose.
The only frustration for us is collapsing it when we are out of practice. Even fully expanded, but flattened, it fit in our truck. If I forget how to fold it up every once in a while and have to carry it home like that, I'll be OK. A quick watch of the video once we were home and my wife had it put away in a snap.
I pack camp chairs, privacy shelters, and several other items vertically like books rather than stacked. We usually just slide the porta-privy in between a couple of our chairs, with a net over the top. It is easy to get in/out.
Other than the pockets on the inside it has been fairly durable for what it is. We don't use ours a whole lot though, so I can't speak to the long term durability.