I have been using the Davines Naturaltech energizing shampoo since I got it in my Birchbox a few weeks ago: I love it. The aroma, albeit a bit medicinal, is actually pleasing, and the feeling of the shampoo in my hair is great.
I cannot tell whether the shampoo makes my mane thicker or not, but I do like the feel of my hair after using the product. I liked it so much that I purchased a full-size option once it came back in-stock on Birthbox.com.
I highly recommend this shampoo.