I have tried almost every box and packet bleach out there and this one is probably my favorite. I am very sensitive to chemicals, so I usually have watery eyes every time I bleach, but not with this one. It does smell rather bad, though, but it's hard to find a bleach that doesn't. It doesn't burn at all. One box comes with an oil creme lightener and 3 activator packets & is about $6 at Sally's. It took me a while to find the directions, but they are printed inside the box! My hair is naturally almost black, so I would recommend using all three lightener packets if your hair is similar, although the box only says to use 2. I would also recommend using a 40 volume developer if your hair is naturally very dark and / or thick like mine. If not, the box recommends a 20 volume developer which you'll have to buy separately. I leave it on for 1 hour and it always lightens my hair to a very light blonde, without that much damage. I would recommend this, but not if you have never had experience with bleach or if you are very sensitive to smells. Overall it's WAY better than quick blue.