So, Here Is Pros & Cons From @doodleman:
Pros: A new generation of weighing scales with wifi connections, so we can see our weighing data on smartphones. One of the things I like best is when we can see the total percentage of fat in our body.
Cons: As we know, that sometimes the scales have a certain usage period, when it's time, the probability of the result can be inaccurate. Is there a way to calibrate it?