I like the looks of this product. It was fairly simple to set up.
I have some reservations as to the accuracy of the scales - I weigh myself at the same time each morning but the readings fluctuate quite a bit. The heart rate readings also seem a little unreliable (30 bpm?), and sometimes fail to get a reading. I set the scale not to show fat percentage as the readings take far too long and seem arbitrary.
The weather forecast at the end is a useful little feature.
All in all, the scales are useful for monitoring long-term trends - I just don't have confidence in individual readings being accurate. To be even-handed, they were second-hand so there's always the possibility that they're not working as intended.
I started using the scales together with the mobile app two weeks ago and I already lost six kilos. The display shows a weight progress and heart rate graphs. The app interacts with other apps on my phone to calculate calories intake, weight loss, activity levels, sleep patters, heart rate, and more. I highly recommend the scales to those who are serious about losing weight and keeping control.