I also like the color scheme they use. It's not in your face, but it's not dull either. It's warm and inviting. Also, they have an area to narrow your search, which is something we want to do for our site. It only appears once you have chosen an area in which to look (i.e. wedding invitations). It's not on the home page, which it wouldn't make if it were on the home page. So that's good.
One other thing I like what they did with their site was using 'breadcrumbs'. It's a really good idea to use these in such a complicated site so the consumer doesn't get lost and decide to leave the site altogether. Losing a customer is never good.