I do OK with polyquats, in say a B&A style gel, but I don't get the same big, fat clumpy curl definition I get if I use a PVP/VA gel, like Got2B or Angell. But the polyquats give more softness. I've started layering them: the PVP/VA on my wet hair before it goes into the towel, then polyquat gel afterward.
I have learned that PVP alone (w/out the VA) doesn't hold in humidity for me. And there's an article by Curly Chemist giving examples of which polyquat's do best in humidity.
3B, bra-strap length
laidback, very-modified CGer
HG: GF Sleek 'n Shine Leave-in; Alagio