Some Number Drift
I've had this scale for a while now, and generally like it, but if you reweigh yourself right away, the weight usually fluctuates 2/10ths of a pound (+/- 0.2).  I am using the scale on a firm tile floor.  The weight then tends to stay at the second number without changing for the rest of that session.  The bodyfat percentage can also move around a bit.  The app is easy to use, but deleted entries occasionally reappear. Home Wi-Fi setup was a bit of a hassle, but has worked well since then.
Rating: 4 stars