I've been using BAQ (Body Art Quality) Black African Henna from Mehandi.com for about 4 months now. Even though Henna is kinda drying to me to use straight up, I find it does a bang up job mixed with other things to curb the drying effects, boost moisture and shine. I will typically mix in Amla (to retain and refresh curl pattern), Indigo (to cool the intensity of the red to a dark auburn color), Camellia oil and sometimes Honey.
I will steam for an hour with the Henna pack on my head, plastic cap it and putter around the house cleaning and doing laundry for another 3 or 4 hours and rinse out. I mixed up a pack on Thursday evening, cover and let it sit on the stove until early Saturday morning when I apply. I'm infusing my Camellia oil with fenugreek, amla and hibiscus flowers and I will add 4 or 5 tablespoons of the mixture to the Henna, along with the Amla/Indigo mix I make and put in right before I apply the mixture.
I will probably deep condish after as well.
Sometimes I will deep condish the following day so I can make sure I have gotten out all the henna and to determine dryness level. Will post after treament pics!! I'm really loving the color it gives also...wonderfully highlighted hair without the trip to the hair dresser, chemicals or hundreds of dollars!!