The only one I have and have used is the outback porta-privy. The ease of setup is only exceeded by the frustration of folding it back up if you have forgotten how between uses. Before starting on a trip I try to take the time to carefully and slowly open it (so I can pay attention to how it folds) and close it a few times to refresh my memory. Otherwise I have to let my wife deal with it, she seems to have no trouble at all with folding it up. It has held up very well over the years but if I broke it I think I would get another. It is big enough, light enough, sturdy enough, easy enough to pack. If I recall correctly it only cost $30-$40.