Recently, I use it as a router behind a box, the X1000 is connected to the box by its WAN connection. It has access to many parameters not available on some box: choice of DNS, regulated access following schedules for children, WiFi N, etc ...
Most: versatility router modem / router, IPv6 compatibility, reactivity menus, making quality
The -: only 3 LAN ports (one can use a switch)