I was a bit taken aback but that's okay. I understand what you are saying. Unfortunately, with this board it seems like unless a million people are doing it or approve of it, people will dismiss it. I didn't feel that there was any immediate danger so I went ahead and tried it. I'm glad I did because I loved the result. I feel a lot more confident using this as opposed to some of the other dyes.
I could only find three past threads discussing it and there were no definite horror stories, people were just a bit unclear about whether it contained metallics and such. The reason people use BAQ henna is because they know that BAQ henna doesn't contain any metallics. I also read many of the reviews on Amazon.com and I would say that about 99% were positive.
here are some reviews (of the Colora creme) from folica.com
http://www.folica.com/Colora_Henna_Cr_d1215.html
I'm not trying to sell you on it...just explaining why I chose to use it.