I have purchased from ACW about 6 or 7 times. All items were in great condition, well packed for shipping, and received quickly. Mostly MAC lipgloss or lipstick, a few eyeshadows, and maybe an UD item or two.
Sometimes the discount isn't worth buying from ACW if the product is available at a retailer like Nordstrom, because there is Ebates and free shipping, while ACW charges shipping and there's no points/reward system. Also, I have tried to get in contact with the seller, and she didn't respond to my emails.