Alice, a reviewer, highly recommends the Root Concealer Touch Up Spray in Black color by Style Edit. She emphasizes the importance of root spray for anyone who dyes their hair, comparing it to the significance of dry shampoo. According to Alice, this root spray is a lifesaver as it effectively conceals roots without leaving any noticeable residue. Unlike cheaper alternatives that feel like spray paint and leave a mess on hands and pillowcases, this product is flexible and feels natural. Alice suggests that if you're in search of a high-quality root spray, this one is a great choice. Overall, Alice's review highlights the effectiveness and convenience of the Root Concealer Touch Up Spray by Style Edit.