The sales staff can be overly pushy, as other reviews note, but they do know the products. There's a demo sink where customers can try products, or just rid their hands of mall cooties. The products are amazing, and they will give you samples if you're unsure about something new.
Save the plastic containers! If you collect five, you can trade them in for a mask. The best way to get good deals and try new products is to attend store events. These generally involve gift bags or other freebies if you spend a certain amount or buy specific products.