Review (3/5): You'll use the whole bottle....
If you're going for a true platinum finish and you haven't obtained it yet, there's some things you need to know. This bottle advertises that you'll be able to OBTAIN a platinum look with it, but I'm skeptical. I followed all the instructions carefully. After bleaching (twice), I obtained the lightness I was looking for but still had the brass, naturally. I rested my hair and hydrated it. Two days later, I applied this product to wet hair with gloves and rinsed after 2 minutes (per instructions). No results. I went right back in and reapplied for 5 minutes. Lighter, but still lots of brass. Using it the next time I shampooed, I left in for ten minutes. Lighter, but still brassy. See pictures. I will end up going through this entire bottle, I think, and don't know if I will be able to get the true ash white I'm looking for.
The scent isn't offensive to me, but is a very strong orange scent, which is almost house-cleaner-ish instead of beauty-product-ish. Shrug. Not a deal breaker.
The upside to this product instead of the T-18 Wella is that it's easier on your hair. Mine has no dryness after using multiple times. However, all told, I'm sure I'll be going back to Wella. Just too much effort to lift the brass from my hair. I like the one-and-done method.