Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lifesaver of a Product

I have been using this for a couple months at this point, but it just now saved me from a hair crisis and I felt moved to write a review. I bought this when I lightened the ends of my hair to a near white and wanted to maintain the tone. It always did the job and I'd notice the difference if I skipped a week. Just tonight I cut my hair and had to touch the color up again, but I used a different product (1st time: Revlon Frost & Glow = GOOD 2nd time: Clairol Frost & Tip = BAD). Yellow. Gross. Horrified; I start a new job tomorrow. I lathered my hair up with this and left it on for just short of ten minutes and it saved my tone. It looks like it did before. This will stain light-colored things if you don't rinse it off immediately, which is the reason behind my 4-star rating. I guess that's to be expected when this is as effective as it is, but it's still a hassle. I highly recommend this to anyone in need of tone correcting.