Funny you should mention it because I relaxed my hair with the SE regular Lye today and am quite happy with the results. Considering I was nervous about doing a lye relaxer on my own, I thought it was gentle, had very little scalp irritation, and my hair has life and body. However, I do agree with the earlier poster that if your hair is very resistent this may not be for you. It does not seem to be as stong but that is perfect for me.
Otherwise, I have their shampoo, conditioner, Megasilk Moistuizing DC, curl defining foam, and Heat protectant and have been quite satified. I am still in my experimentation phase but I would have no problem making them staples.