I just finished unpacking a new DIR-605L, and although I appreciate the small form-factor the physical design has a significant flaw.
The power cord port is located (very tightly) between the rear Internet port and antennae. Since the power cord employs a dog-ear design, the only way to attach the power cord is to point the dog-ear straight up, causing the power cord to stand up above the router and loop back down. The cord can't twist left or right due to the Internet port and antennae. If the cord is pointed down, the rear of the router lifts off the surface.