I have had one for a few years. I thought the daily target was 1000 steps, maybe they have reduced it to be within more people's reach!
However the important thing, I feel, is to do what you can and increase gradually. I have a few health issues and aim for at least 2000 - that's just a trip to the local shops. I am happy with 4000-5000 and have only achieved 10000 a few times.
The Fitbit has made me far more conscious of how far I walk. If I miss a bus I now walk to the next stop and I don't put off going upstairs until Ihave several things to carry up.
Mine really has helped improve my health and mobility. I hope you enjoy, and benefit from, yours!
My daughter's has prompted her to take up regular running, entering Park Runs and getting in daily competition with other mum's!