This design from Andrew Crowell is a very deceiving design. I think that it seems easier because of fewer moves and rotations, however, this has a very challenging multiple piece rotation that is just amazing to me. This rotation can be made without any pressure or odd maneuvers. It must simply be done very precisely! Andrew recommends shipping this assembled but with one piece left out! Which is an interesting twist to his assembly puzzles. I will also ship this totally unassembled if you ask, as this is a real challenge to assemble entirely. 16 Total moves with 3 rotations.