I have drunk the Apple Kool-Aid: I have iOS devices, AppleTVs, and a home server running iTunes. Admittedly, the iTunes server is serving video and music that is ripped from legitimately-acquired spinning-discs, so perhaps I haven't tasted the iTunes Store Kool-Aid.
I purchased a Chromecast right at launch. As far as I could tell, the only things it did well was Netflix and stream YouTube. However, for my purposes, the AppleTV was better at both, so I literally put the Chromecast in a drawer.
When someone announced a jailbreak for it, I took it out of the drawer, rooted it, fiddled with it some more, then put it back in the drawer when I realized I was just wasting my time.
I'm not trolling, here; I really want to know how you use it. Is it that is works better with Android devices? Is it providing a better, open, AirPlay alternative? I just don't understand how it is in any way more useful than existing STBs--if not the AppleTV then, e.g., a Roku.