It works pretty good on TV shows and such, takes like 2 seconds. It identified a TV episode that had no talking going on, but back round music. But when I muted the TV, it could not recognize .
I held it up to my cat who gave me an annoyed look and FireFly put in the screen "Is this a cat?"
Not sure how often I will use this in real life situations. I don't carry my Fire around when I go out and about. I am thinking this is more useful on the fire phone.
I don't have kids, but I an see how that could keep them entertained for a while.
It gets songs too I think, although I didn't try it yet. On the TV show it puts all the info on the screen with a handy link to the instant video store.