Firstly it was just curiosity but now I think it's much more enjoyable/fun to do the progressions. A heavy DL is impressive but a Front Lever or a freestanding Handstand push-up is much more for me :D
Two big extras:
- my body looks amazing, never could get it doing regular gym training or powerlifting.
- I can train anywhere and by that I mean training at home using nothing but underwear :D