I was trying to use the web site the other day to order and their cart software sucks ass. My first problem was I'd selected a page from the browser history and the cart doesn't work if you're not in their framed environment. So I corrected that and selected a bunch of items only to find that I couldn't view my cart because of the pop-op blocker. When I disabled the pop-up blocker it reloaded the page which blew away my cart. So I started over again and was able to view my cart, but had to make several corrections because when you add an item to the cart the only indication that it was added is that the total at the top of the screen updates. Several items got added twice because I didn't see the total get increased and a couple items didn't get added to the cart. So I got all of that straightened out only to find that I couldn't select anything from the pulldown at the bottom, I think it's where you enter your zip for calculating the shipping.
Finally I said to hell with it and picked up the phone. She was pleasant to talk to, extremely helpful, answered a couple questions about things I wasn't sure on, and pointed out a way I could knock a large chunk off the total by getting some of the parts as bundles instead of individually.