I like the Nifty Seat and have had it for years.
Seems a couple of us find that once you've "set" on it a while, it won't come apart without a good set of tools to crank it apart.
Only other comment is that perhaps due to my build or getting old/fat(er)
...but after about an hour sitting in that thing, everything goes numb below my belt to my knees! Love how it rotates easily and is easy to set up. Stout, but light just means it would break.
Just hate the numbness for longer sits!