I tried the fitbit for about a week and then returned it to the store I bought it from.
It was not very accurate about my activity. For example I would be laying in bed and it would tell me I had taken 8 steps already.
I had a huge workout for 1 hour and told me I was only active for 21 minutes.
I would like if it asks me how I am feeling every day and give me feedback on which days I felt better and show a chart with what I ate, how I slept, exercise etc to correspond with how I am feeling.
It didn't really help me to know how many steps I took in a day, I wanted more information.
I was going to try the jawbone up because it asks you your mood, but I read the reviews and decided against it because they are known to stop working after several weeks.
If fitbit was to provide more detailed information about how I am feeling in correspondence with my diet, activities and sleep I would definitely buy it again. I love how the band is small and a lot of times I would completely forget I was even wearing it.