I used to use a FitBit Aria and it sends data to the internet. It died, and I wanted to get out of the FitBit ecosystem because it doesn’t write to the iOS HealthBook system.
This scale uses Bluetooth, and while it has added a step, of launching the app, which I always do to ensure capture of the recording, I prefer the direct transfer to the iPhone. A bonus is that it writes directly into HealthBook without having to do an intermediary syncing step.
The scale seems fast and accurate. I was familiar with the trend of recordings from the FitBit scale, and when I started using this one, that trend simply continued, so I was satisfied that it was accurate. I also like the additional readings that come from having electrical contacts on the surface. Also, a good price, not too cheap and not inflated.