It was incredibly easy to add this to my existing Sonos installation. Plug in power & Ethernet, add player to any controller and in less than 5 minutes it was playing music.

Contrary to marketing confusion this works with all existing controllers. I have tested it on all of the ones I have (CR-100, iPod Touch, iPhone, PC and Mac). Worked perfectly.

I look forward to being able to easily move this from room to room throughout the house...

[The 100 word minimum of the reviews here, as well as the obligation to fill in both a summary and a full review, is a bit restrictive. A simple review for a simple product didn't require more text. I just typed this last paragraph to (needlessly) fill up the review field]