Access ssh, ftp, sftp, https, multimedia server, network control, VPN, user management, group management, share folder management, IP blocking, firewall, DDNS, WEB service (allowing the creation of a website internally), TimeMachine, iTunes Server and largest package center, which allows a very simple way to install a new program and even manually.
Play the most of this transcoding on the fly to improve quality and decrease the image / sound jerks.
plugged into my box I have access throughout the home via wifi or pc tv connected to all my documents, pictures, movies => bliss
I really recommend especially when we know that nas is mostly a data security when configured in RAID 1