First of all I have to say, I am so glad I never went out and got a permanent tattoo. After about two days of having the henna designs on my forearm, I was bored of it. But I don't blame the henna for that.
Anyways, onto the product. I was very happy with it. I followed the instructions book (yes, it is included, for the person who gave this one star and said it didn't come with any), and then let it sit for the suggested 6 hours. I applied it, and so on. Once it's applied, it says to leave it on for about 6 hours. The book says it's similar to toothpaste, in consistency, and they're right. After I applied it, it hardens and breaks up into smaller sections. However, it said to leave it, so I did.
But not for long enough. I left it on for about 5 hours (it became increasingly irritating not being able to do things with my left arm and hand for fear of smearing it), and then scratched as much as I could off. And then I did something else the book recommended you don't do. And that is not to get it wet for 12 hours. But I had to wash my hands after I scratched it all off.
Anyways, After I scratched it off, it was a dull orange color. I went to sleep, and when I woke up, it was a bright orange. I was a little worried I hadn't left it on long enough, and this was as dark as it was going to get. But again, the book was right. Over the next few days it went from a bright orange to a light brown, and then a darker brown. I also kept adding to my designs, and going over areas that I wanted darker.
As it stands now, I can just make out the last of my designs where it was darkest, and it's been three weeks.
As for areas of application...I found that it works best on the forearm, and the palm area of the hands. I had intricate designs on the back of my hand, but I wash my hands often, so it came off quicker there (don't get me wrong, it lasted for a good couple of weeks there, but without re-application it will fade faster...unless you don't plan on bathing!).
Overall, I was very happy and impressed with it, and I will be ordering more soon. My suggestions for it's application is to have toothpicks and paper towels at hand. I kind of laughed at the inclusion of toothpicks in the kit, but I learned quickly that you will make mistakes, and make accidental smears that will need to be quickly taken care of.