I have been wearing the band for a week now and these are the things I like about it...
1. Easy to wear. It is non-intrusive. I don't remember I have it on but since it is on my wrist, I don't fear that I will drop it or wash it by mistake. I take it off only to charge it while I am watching television.
2. I always thought I was a morning person but now that I see my graph for the day, it seems my "spark" comes around 2:00pm. I never noticed an increase in activity at that time of day but hey, I now have proof.
3. It motivates me to move as tamiam said, I set my goals and I can see (when I sync with my iPad or check the band) that I have not reached my Fuel goal or my steps goal, I feel like doing more so that I can make up the few steps. So far I have only reached my goal once, which let me know that I am below the activity level that I would like to reach. It makes me want to do more.
4. It looks like a bracelet so people don't really know what it is or why you are wearing it. That stealthiness in itself limits comments about weight loss but helps me to feel confident that I am doing something good for myself throughout the day. I can tap the button and have immediate feedback that I am on track to a healthier me.