It didn't take that long. I had to experiment with some different bands. The first ones I bought were too big (I never planned on using the rubber bands in the SL starter kit). I found some that were small but worked ok, although a few slipped off while I was shampooing. I used the SL starter shampoo and the knotty boy shampoo because of my dry scalp. After reading stories about the starter shampoo drying out your scalp I didn't want to chance using just that and going another week before shampooing my hair.
As you can see from the shots below, I had some slippage around the front where my hair is really short, and the scalpy look has gone away. I don't think you can even tell my hair is locked in the front after flat twisting it now.
flat twists before shampoo
flat twists after shampoo
I have some slippage in the back of my hair too in a few areas where my hair had broken off really bad before I got my SLs, so it was really short. My follow up visit is next week so hopefully my consultant will fix the front of my hair and my report won't be too bad after my shampoo attempt.