I'm a fan of the Nike FuelBand... I love it... I wear it all the time and it definitely has made me more "active" in general... I really have become addicted to earning Nike "fuel"... and even though running is my main thing when it comes to exercise.... I'm walking everywhere a lot more just to earn more points for the day, which is a good thing...
From the online reviews that I've seen the Jawbone didn't do so well... but I know a lot of people really like FitBit and I actually would really like to try one out which I probably will do at some point since I'm sort of gadget type of person when it comes to personal fitness... But to be honest I don't see myself giving up my FuelBand anytime soon...