My experience of it is it`s a really good product ---especially for helping to `hide`the color differences which can be a problem, between growing and system hair..... the only thing I noticed was that as time wore on when I wore toppers, and as the hair became more `tired` it [the hair] was less inclined to `take`the color as easily as in the early days, so I then used a `normal`[harsher too] proprietary coloring solution, but that wasn`t too much of a concern at that point in time because usually by then I had another system on order so the `harsher` product was just to tide me over until the new one arrived.....the really good thing about back2natural is that it also conditions the hair as it colors it..... I think that you`ll really do your system a lot of good younggun, and help prolong it`s viable life, by using a good leave-in conditioner which has sunscreen in it.....the `Enhance`one I use has it...there are others available too, but so far I`m very happy with that one as it`s not inclined to `clog`the hair..... just tried the link to the UK site where I intended to buy it next time....they`ve changed their site and I can`t see any mention of `Enhance`` :-( Will e-mail them and ask are they still selling it...that`s very strange now.hmmm .....Anyway, here`s another link which may be of help.... http://www.thenearlynaturalcollection.co..._16_oz.php Paul.