Updated after months of ownership... I've recently jumped into a "dunk tank" to accurately measure my body fat %age, and needn't have bothered. This scale had it nailed within a half a percent. Ridiculously accurate, at least for me!Nokia has since bought Withings, and the app changed for the (much) worse, and since has gotten a bit better.Also, I've added an additional image of pulse wave velocity over time. I've become convinced it's a useful measurement. It seems to tick up during periods of stress (e.g. a recent routine orthopedic surgery). It'll be interesting to see how this measurement's use evolves over the next few years.Bottom line: I really like this scale, and highly recommend it.Back to my original review:I bought into the "upgrade" from the basic Withings scale on a lark, and at the beginning regretted it. But I've learned how to get a pulse wave reading fairly reliably: (1) I wet my feet slightly before getting on the scale, and (2) after the weight is taken, I put my hand on the wall to steady myself while the other readings are taken. Even then, it's not a 100% thing, but the reading is taken often enough to get a meaningful trend (see pic). And, no, I haven't figured out of it's really cyclic or not... only time will tell.I don't know whether the pulse wave reading is particularly well understood yet, but I'm proudly "optimal" (at least for a 60 yo).But to the basics: the scale is ridiculously accurate, easy to setup, and of a very high quality. Highly, highly recommended. And as you buy into the Withings ecosystem, the phone apps and web portal become more and more useful.