[fjtorres]

No issues here.
Works perfect connected direcg to my SHARP tv and also plugged into the XBOX HDMI in. No lag or image degradation in the latter case but it does properly pause when I switch the XBOX away to a game or app. (Nice that it does; the TV's four ports are already in use.
Most of the functionality is redundant for me except for the PRIME music but even the video streaming works fine.

In my case, though, the router is a lightly loaded dual band Wi-Fi N barely two feet away and I have few neighbors nearby to suck away at the cable modem bandwidth so there is no reason for any video degradation or interference.

And yes, I power it straight from the included adapter.
Plenty of outlets among the rat's nest of wiring behind the TV.