I got mine when released. Cost $11 net with the Netflix credit. Other than trying it out, it remains unused. I wanted to connect with my VZW unlimited data plan and stream with my S3. Can't do it. The CC and source must be connected to the same WiFi network. You cannot do WiFi and a hotspot on the S3 at the same time. I can connect the CC to my android tablet and connect them both to the hotspot and that works. Unfortunately, all I can then stream is Netflix, Youtube and Google online music. My Roku does all that. As of yet, one cannot cast from the Chrome browser in Android. Must be Windows or Mac. I can also connect my phone and tablet directly to my TV's via HDMI which is much easier and will display whatever the device is displaying provided the DRM tickets are punched.
CC is supposed to have a great future ahead of it but for me, for now, it's a novelty.