I've been using the powder for two months, and I've still got plenty left! It's always tricky when buying sample sizes to know how long it will last. It alone is worth the price of the sample box, but the primer and BB cream are great to give Smashbox a try when you're on the fence.
Careful with the baby buki brush- it feels lovely, but when it starts shedding, black hairs on your face are hard to get rid of.
4 stars, only bc I mainly use the one product from the kit.