I think this workout might be working!
I have zero concrete evidence to back this up. This morning I woke up, and I swear - I think my abs felt tighter. My muscles felt 'happy'. I am well aware that 3 weeks (of working out twice a week) in is too soon to tell. But today I feel good.
Last night I was tired, I think the humidity may have got to me. About halfway in I just zapped, dizzy, hot, light headed. I did not stop, I did how ever slow down. Hopefully tomorrow I will do better. But I did not give up.