Kizaru is super cool in how he fights. I have always loved him and his demeanor.
But I'm losing respect for him every chapter that goes by without Luffy clearly using aCoC on him, or Kizaru using it himself. Come on, man, be a top tier.
Then again G5 Luff vs Kaido looked like he wasn't using aCoC during plenty of chapters that Oda simply didn't feel like making every hit look special/unique, so it's also very possible Luffy has used aCoC all along. Even against Lucci.