It's pretty crazy. It isn't so bad if you order enough that the S&H evens out, but for smaller orders it's absurd. Kind of comical actually. My last order ended up being enough to PACK my SUV, and the shipping was almost nothing. The items came from like 5 different warehouses, too. And things that were already in a large box, were put inside another large box, it was so wasteful.
The really bad part, is they carry a lot of items you just can't find elsewhere. I've looked for a few things that I ended up biting the bullet on, just because the other options cost even more.