I left it in my hair for only 30 minutes (usually I leave it in over night) and the results were great! It made my pale yellow hair completely stormy blue. In the sun light it glowed and shined like a jewel. After about three and a half weeks it started to turn a little green which was still pretty. A month after I dyed I made my hair brown again but there was still a small amount of greenish blue left in. The only Manic Panic I used that stain my neck blue days after the dye job and some of my shirt collars. Don't let that discourage you it was easy to clean and all in all its was a very beautiful color!
(Emailed Review from IceCat02)