I tried this and so far, so good. I didn't use a banana since I didn't have any and my hair doesn't need much protein anyway. But I did keep the rest of the recipe as it was and left in in my hair for 1+ hour. My hair is still a little damp, maybe 80% dry. It's very shiny and I notice my curls are a little more defined as well. Great treatment, though the smell is not that great. The coffee helped improve it though!
Latina

Type: 3a
Dense, fine/medium texture, low porosity

Low-poo: Devacurl No-Poo/ Yes to Carrots Nourishing Shampoo/ Elacel Aloe Vera Shampoo
Conditioner: Garnier Fructis Triple Nutrition Conditioner
Leave-in: Devacurl Set It Free/Lush R& B
Styling: Herbal Essences Set Me Up Spray-Gel/ L'Oreal Silk & Gloss Curl Power Mousse