LEWIS3000US

I have been using my one Withings scale since December of 2011.  I do notice some variations, even when I weigh myself twice in a row.  But the variation doesn't really bother me.  

The point of tracking your weight is to see trends, and for this task the Withings scale and app work quite well for all of us in the family.

I have never paid for the subscription, but the basic app features are all I want.  That includes support for IFTTT.  Most importantly we have historical data in all its glory.  The scale recognizes multiple people well as long as each person does not go too long without weighing themselves.  You can assign unrecognized weights to a person to get the system back on track.

Strongly recommended.