I've come here a few times, usually with an idea of what I want, but still unsure. The employees have been incredibly helpful in finding the right Dita Von Teese eyeshadow pallette for a glasses wearer, matte Stila lip stain, primer for scars, and the perfect hue of blush for my pale skin. If you'd like, they can give you helpful application tips and personal opinions while they let you sample just about everything in the store. I much prefer this store over the Fashion Square location.
And if you're looking to get your makeup completely done for a special occasion, then ask for Lisa! The day I was getting photos taken, she pulled from all the best brands to make my skin look as flawless as possible, while still having staying power in the summer heat. All I had to do was buy $50 worth of product, which is simple enough considering it's freaking Sephora where two products can easily leap past that amount. But you get what you pay for!