I bought a packet of this in 2013, but didn't use it because I was freaked out by some of the 1 lippie reviews on MUA. I have been dying my hair from medium brown to light ash blonde for over a year and a half now. I currently do my roots every six weeks, and then typically tone with a mixture of Wella Color Charm T18 and T14 about a week later. I could tone the same day I do my roots I suppose, but I like to give my hair a bit of a break from the processing. The downside of that is that for that week between when I've done my roots and when I tone, I am stuck with bright gold hair.
Yesterday I desperately needed to do my roots, but I had to go to a party in the evening and really didn't want gold hair for it. I decided to take the plunge and dug up the packet of Ardell Red Gold Color Corrector, and put the entire contents into the dye mixture for my roots (half a tube each of Ion Color Brilliance gel in 10V and 8V, mixed 1:1 with 40 vol. developer), applied it, and left it in for 40 minutes.
Well, I only wish I had tried the Ardell Red Gold Color Corrector sooner, and that I had bought more of it! By the time my hair dried, I was pleased as punch with the tone. It's not completely ash, but it did a pretty darn good job of toning down the gold. Anything that makes my hair a bit more tolerable before toning has a welcome place in my routine. Next time I go to Sally's I will be picking up more of this stuff!