Their shipping is a bit weird. You pay $9.95 and then you get unlimited shipping for 30 days. So it's really only worth it if you expect to place multiple orders in a month - otherwise you might be better off paying $10 for flash shipping at Sephora for a year and paying full price for your stuff - or paying full price with free shipping at Nordstrom. You can do the math.
You do need an account to browse Rue La La, so here is my invite link.
Anyway, this is another option that is out there! It's been quite a while since I bought anything from Rue La La. I assume shipping takes a while, because, like HauteLook, you get the product from the brand rather than directly from Rue La La. If you are a regular Rue La La shopper, is there anything else people need to know?