I really liked mine when I got one. With Plex Media Sever I didn't have to use my PS3 to stream videos from my computer anymore. That by itself was worth the admission price since the PS3 is pretty shitty at video streaming.
But I switched to a Roku streaming stick eventually because they have a lot of free channels with the stupid crap I like. Mostly old movies like you might see on MST3K and other weird stuff like that.
So now I have my Amazon TV stick ($20 intro promotion so obviously I had to buy a couple!) and Roku plugged in and the Chromecast just sits in a drawer.