Not as consistent as I would like.  Difficult to set up.
Setup was not as easy as advertised (I actually had to upgrade my router to make it work consistently.) Also, most annoyingly, the measurements are inconsistent (by 1.5% to 3%) for both weight and body fat. I take 2-3 measurements each day and choose to believe the lowest ;-). Overall, I have been disappointed with this product. I only use this device because it's the only device that integrates with Fitbit.  I will say, on the plus side, Fitbit customer support has always been prompt for me.  And as customer support notified me: you must keep and store this device in the horizontal position, or it has to recalibrate EVERY time you use it.  That will get you REALLY inconsistent results.
Rating: 3 stars