In fact , it is not so easy for me to get a new Mac Air. I thought there is no problem for such a high-end product to use the Gigabit Ethernet LAN in my dormitory. It turns out I was wrong. I even didn't find a port to plug the LAN wire. Later I refer this to the seller and he offered me to buy their related product as the Air is a wireless-only machine, forcing users to find a Wi-Fi connection, even if there's a more stable wired network available. I would like to know except their offer, have any other better choice ? But I doubt whether it will make a difference not use the Apple's own product? Is it reasonable for my worry? Or should I take some risks to have a cheaper try?