I'm all over the "MapMyRun" suite of apps and run them on my android phone. I think the fuel bands and Nike + devices of the world are cool... but why do I need them when I have my smartphone?
I've been using it for months. I like the security of it since my google account basically has my whole life.
Once you get through the application specific passwords its ok... if you don't use shared PC's a lot it is fine.