I have used this product multiple times and was happy with the results.

PLEASE NOTE: This product takes your hair back to the lightest colour it has been. ( It washes out dye you've used on your hair. If you have over processed hair, you may need to applications ) So, if you have previously bleached your hair and it came out all yellow and brassy, that's the end result you'll get.

This is a great product to strip your hair color without bleaching ( wayyyyy less damage ).

I used this to make my transition from red hair to blonde easier and saver.

Downside: It smells REALLY bad. And the smell kind of sticks to you.

I have long thin hair and I used one pack ( The liquid is really slimy making it easy to spread )

I would recommend giving this product a try before reaching for the bleach kit.

Although this product doesn't have an overwhelming smell that takes your breath away, it does have a rather unpleasant smell. One of the biggest problems I have with this product, is how much time you need to spend rinsing, especially if you have long hair - five to ten minutes, followed by another five minutes after the minute minute of buffering. By the time I had to do the second buffer rinse, the hot water was finished (heat is very important, since it apparently helps to shrink the colour molecules).
I would also have liked a conditioning element like you get with hair dyes, to treat your hair (which will probably feel a bit straw-like after all that rinsing) and to help eliminate the awful chemical smell.

This product works best on the root and mid-length bits of hair; my ends are still discoloured, and I have neither the time, patience, hot water, or money to give it another go. At R169.99 a pack, I'd rather go to a salon and know they will get everything out, and have enough hot water.

This is one of the best products' I've ever come across, and hats off to the genius who has brought this product to South Africa! ColourB4 is a product which you use on you hair (exactly the way you use hair dye) and it removes all the old hair colour from your hair leaving you with your natural amazing hair colour. This amazing product has been making waves around South Africa and is completely gentle and contains no ammonia or bleach so you know you not damaging your hair at all.

You're probably wondering how this product works right? Well...It works by shrinking the artificial dye molecules in your hair, leaving you to wash them away. Sounds pretty amazing, and you will be really glad to know that Colour B4 does not affect your natural hair pigment. It’s the safest, most effective way to rewind hair colour.However when using this product make sure you cover up all space which can get stained and use gloves!

What's in the box?
Activator (Part A)
Remover (Part B)
Buffer (Part C)
Instructions
Gloves

So here are the steps!

Step one : Remove the applicator nozzle from Part B (Remover) and pour entire contents into Part A (Activator). Shake for 30 seconds.

Step two : Once mixed, apply Colour B4 (using the applicator nozzle) onto hair. Work quickly as the product strength will decrease the longer it has been mixed. Use a large-toothed plastic comb to separate sections and ensure even distribution.

Step three : Once evenly applied, leave in for 20 minutes. Do not let your hair get too cold during this period. A cold environment will produce less effective results.

Step four : Rinsing is a very important step in the process. Once the allocated leave-in time has elapsed, rinse with warm water for at least 5 minutes and up to 10 minutes if you have longer hair.

Step five : After the first rinse, apply Buffer (Part C). Work into lather and leave in for 1 minute to absorb. Rinse again for a minimum of 5 minutes.

Step six : After the second rinse, apply the Buffer again. Lather and rinse as you would with a normal shampoo. After all traces of the Buffer are removed you can towel dry your hair.

And the colour is out! I would recommend you try this product to remove any hair colour which you have in your hair because it helps enhance the colour the next time you dye your hair and hair will look better and have a more enhanced look! Plus this product is so easy to use!

I've combined my review with information from the website. I hope this review helped you.