I am satisfied with the XNFIT it makes everything that what it should do. The accuracy may not be so particular to it. It's like with the scales one weighs more, the other less but who you increases, all both upwards. I have taken the trouble and the steps counted in Selgros, at 500 I had had enough, but in 10 steps next I was satisfied. Another tip, I give myself 5000 steps the day before and if I do not reach, I may even go 5 Km bike. By that I mean, do something better than to complain about the accuracy. It is a good support. The sleep mode is also, I was surprised when turning in bed or getting up, he shows different bar heights, and that fits with the time in line where it is done. I am happy although it Währe beautiful with Bluetooth and app, but the damned spies.