I've done it a handful of times. It can be hit or miss depending on stylist. I've had boxes that they listened and sent everything I was looking for. I've also had a couple that were way off base, I wondered if they even read my request.
Our Client Experience team is here to make sure your requests are front and center for your Stylist. Please always feel free to touch base with us through the Help Center if you need anything or have feedback to pass along!