I've used this Shampoo for almost 2 weeks now and I'm not 100% convinced it has made my hair thicker, but I do think it has made a difference. Normally when I straighten my hair it is quite thin and lifeless, but it seems to have a little more volume and life to it now - but not hugely so it's hard to say whether or not this range made the difference.
Either way, it was a nice shampoo to use and I would consider buying it for future use. It had a nice gentle smell, and I didn't need to use much to get a good lather.
While this has worked for thickening my hair, I feel like it's dried my hair out as well. I will keep using it but it's not a shampoo that I can use soley, so I will switch between this and my regular shampoo. I noticed having thicker hair after the first wash which is always nice, and it dried looking better than it usually does which I love.