I've been using Natural Instincts for several years, but not sure of the difference between "temporary" hair coloring and "permanent" coloring. Their latest update says it lasts about 6 weeks. It was 4 weeks before. Seems to be holding really well and covers gray nicely.
There are a couple of other things I really like about it. There's no smell and coupons are pretty good. Several times, the company will post 2-for-1s, which is a great deal.
