I have the Nexus 2 with this feature, and it works remarkably well. No noticeable power drain, and it identifies a lot of songs that I never would have thought

I have the Nexus 2 with this feature, and it works remarkably well. No noticeable power drain, and it identifies a lot of songs that I never would have thought to ask about, like TV show intros and such. It's handy that if I ever wonder what a song that's playing is, I can pull out my phone and it's usually already there instead of having to unlock it, ask it what's playing, and wait a bit, if the internet is even working there. Pretty cool that they can pull this off with no network communication.