i love the high concentration as it allows me to only use 2-3 drops every night! i believe consistency is the key and having the small bottle with a dropper is perfect.
the formula is slightly viscous but the product remains extremely lightweight
after only a week i was able to see my scars fading:)
the salicylic acid is perfect for acne prone skin and oily skin, and i used it on my oily skin parts as i have combination type skin
it has denatured ethanol to ease the absorption so you really need to hydrate well if your skin tends to dry up easily
nothing bad really… i do admit the price on it is a little on the more expensive side but we have to remember its a concentrated solution and most serums tend to be more expensive anyway. if you use only a few drop everyday, it will last you long enough