The unit works great - it auto detects a source and switches to it.
I'd give it a 5 star but the remote doesn't seem to work very well. Not a big deal for me, you can click the manual button switcher on the device if you ever need to manually change it. As I noted, it auto switches so the manual intervention is pretty rare.
It allegedly uses power but I've never charged it or plugged in the charge cable, and it's been running for the better part of 3 months so far. It has a USB cable if you ever need to charge it though.