Prices are comparable to Amazon, with free shipping over $35, but in this case shipping is 1-2 days (Amazon usually takes a week or so). I've only ordered a couple of times, but every time I've gotten an e-mail within an hour saying my stuff has shipped, and it's on my doorstep the next day. Crazyness!!
They're also really smart in building loyalty. They stuff coupons in with each shipment, and have a referrel program that benefits both the referer and the new shopper (*wink wink* Enter in my code "MINYMOE" and get 20% off your first purchase, from each site!). On top of that, they have random sales, online coupons that magically appear in your checkout cart, and free sample boxes.
To give you an example of the kind of savings you can score, here's what I got from my latest purchase for $13 (I used a $10 off coupon and free shipping promo, and they threw in a small sampler as well):