Like VickiD, it worked for me to grow back bald spots. I never used it as a growth aids. I am too lazy to bother with those, plus I hate stuff on my scalp...which is why I only used this on my bald spots. Here are my results in pics:
Starting from this:
...to this in one month:
....and then to this in 3 months (No longer a smooth patch - Yay!):
Nine months or so later, I not only had the bald spot completely filled but actually the hair was growing in length too:
And eventually the hair caught up with the rest of my hair in length--of course, I was trimming the rest of my hair regularly. While the photo below wasn't taken to track the progress of that section as it had been 2 years since the discovery of the bald patch and I wasn't thinking about it, you can see from the bottom right pic that my hair shows no sign of that hair loss experience and that it's all basically the same length: