The FitBit is the cuter one of the lot, with a sleek yet chunky look. It’s got a small screen which cycles through a clock function (which is handy), as well as counts for your daily step, calorie, stair, distance, and "active minute” totals. Battery life is great — I only charge it once every seven days or so using a USB cord.
The UP24 is the least "fitness band" of the lot. Its form is quite simple — no digital displays here. In a way, I came to enjoy the watch functionality of the FitBit, so it would likely be missed here if you were only wearing this band. However, the lack of a display makes this band blend a bit more easily — I found that I could pair it with a couple of bracelets, and it didn't stand out.
Nike+ FuelBand SE
Out of the three bands, the Nike FuelBand made me feel most "athletic." The functionality of the app is very fitness-goal-oriented. You'll receive NikeFuel (basically, points for activities), encouragement, an hourly reminder to get up and move, and access to unique workouts from some of the best athletes in the game. So, if your goal right now is to make strides with your fitness routine, then this band is a good bet.