I've used them before, but you really have to check the package weight. I still have the feeling they scammed me once, the package weight from the seller to them was a lot less then when they shipped it on to me.
Hey, im an aussie living in the US who does proxies for people back home for a lower rate then these companies and I don't pull any BS. It's all through paypal so we are both protected. Have done it plenty of times before. If anyone needs help, PM me.