Classic square circle mechanism. It is certainly easy to collapse and travel with. The load chamber
is large. The only downside is that the folding sections don't lock into shape; you have to support
the shape with your hand as you lift the sections; unless they are perfectly squared up it becomes
challenging to replace the inner tube.
However, since it folds flat, you can unfold it in front
of the spectators adding to the mystery of where it comes from.