This is the perfect size to test out to see if this formula works for you. This is a very grippy, sticky primer. I wait at least 30 seconds before applying foundation after the primer. I do not notice any kind of scent or fragrance. Your foundation will definitely stick and cling to your face. I think this is geared toward people who have oily skin or plan on being outdoors in the summer heat. The longevity of your makeup will wear through sweat and humidity. My teenage daughter absolutely loves this primer. It's her go-to for all-day makeup wear. This is fantastic for me during the Halloween season when I do different characters and makeup and want my Halloween makeup to last all day. Paired with the setting spray by elf, you can not go wrong. My makeup will last until I decide to wash it off. I actually prefer the one with added niacinamide because my skin absolutely loves niacinamide in my skin care. I highly recommend you give this a try.