The connection to the Smartphone works without problems (Galaxy Note 4), the online update of data may sometimes take a few seconds for me that is not a problem. As well as the data storage in the cloud. The NSA is hardly interested in my body fat, unless it passes the data to McDonalds next :-)
Advantage of course is that the next time I phone exchange the relevant data does not need extra safe n.
The app (VitaDock +) is also fine. It would be nice if you (such as blood pressure or heart rate monitors, etc.) could eliminate permanently the device not available or used.
For the current price a very good price / performance ratio.