i've used it - but just once so far and that was just last week or so. worked well from first blush. i have been using komaza protein strengthener for the past few weeks and wanted a mid-to heavy protein in lieu of the very heavy/strong komaza. it smells like pickles to me. while i did really like the strength it gave my hair, i am going to have to use a few more times to determine whether the smell is a deal breaker for me. HTH