I just got 6 of these, and I think they're good! I wrapped all my wet hair in them, put on the bonnet dryer, and sat under for half an hour or so. The curls I got weren't as clumped/nice as when I plop and air dry, but they were nice and bouncy, if a little more separated -- perfectly fine, and a good solution for the cold weather.
3b, fine, medium density, normal porosity
Wash: Deva No Poo, sometime Phytojoba, Avalon lemon when needs clarifying
Rinse-out: Deva One Condition, CJ Beauticurls Strengthening, Phytojoba (kinda heavy for my hair but good noisture)
Leave-in: Phytokeratine, CCCCL
Styling: Deva Coconut Supercream or their Wave Maker with a little CS over the top