I had yet to find the perfect toner or essence but this one is very high on my list right now! When you use products full of chemicals, you have to keep in mind how they'll mess with your skin's natural state. I can't pinpoint which products do this, but I often end up with a lot of redness and irritation. After washing and exfoliating, my skin looks and feels pretty worn out (very red!). This toner immediately gave me a very strong cooling, soothing sensation and the redness on my face was toned down by about 75%. The scent is nice and very subtle, and the drying time is good. It doesn't dry up immediately like some toners (but those ones end up making my skin feel too tight) and it doesn't take forever like others (those are more prone to causing breakouts). It's a great balance and makes my skin feel reset after using it.
Nothing really. I think you're supposed to shake before use which someone might forget. Also, I'll never back down on my idea that all toners should be sprays/mists! Would make things more streamlined and less messy/wasteful.