As I found with the aria 1, I have to weigh myself 3 times to get an accurate reading. I don't know if it's the feet that go stiff and need loosening but it's the same for the new one. I'm on a pure flat and hard surface bit that doesnt help. Other then that it's much the same as aria 1 but weight now goes to a decimal place. Slick design and feel and it's handy it goes straight onto your fitbit profile, just a bit of a let down having to weigh multiple times.