My hairstylist g/f recommended them to me the other day, saying that she has clients who's hair is constantly tangling, matting, etc. when she's trying to comb through their hair, and this stuff changes that for them. I picked them up to try (easier to find than Redken Glass, obviously! ), and used it this morning. Didn't weigh my hair down at all but left it super soft, silky and full of body.
It comes in thin and thick/coarse hair options. Find it in a salon or at Trade Secret; I think it was about $12/bottle. Good stuff!