Hi, Corinna, I was using Biotera with the CK, and I switched over to the CK GEL. But, I found that the CK gel seems to be making my hair flat and a bit fuzzy at the end of the day...but, its hard to tell if its the gel or something else...the other day I shampooed with Aveda shampoo brilliant - its not CG - and used TSN, CK and the CK gel, and I got great results. go figure.