The BB was great on my hair the first four times. It was so straight and flat, but my ears stuck out, so I changed the part of my hair, and it was smooth and shiny. Then, the treatments quit working. Twice, I had them re-done. Most recently, the best stylist did it again. It had worked two years before. This time it straightened but did not cut the frizz. Not a success.
Unless someone can explain why it no longer works (it is not the product, nor the skill, nor the method), then I believe the ingredients were altered to get the formaldehyde out.