I got my protein skimmer from them, and it was shipped smartpost. It arrived a day or two later than it would have had it just shipped standard fedex. I think the whole smartpost thing is a great idea for rural areas, but I live in a suburb of my state capital.
Basically, they ship your stuff via fedex to your local post office, then your regular mailman will be the one to deliver your item. My skimmer sat on a pallet at the post office for a day before it went out for delivery.