accurate scale

I've been through a few scales (including Weight Watychers and other digital scales) because I was tired of the number changing everytime I would move it an inch. I just purchased a fitbit aria and it is the most precise so far. I tested it by moving it in different rooms and different spots/surfaces (I get a little OCD with these things) and the result was the exact same everytime. Wish I purchased one earlier! Definitely recommend. I've also heard good things about Withings, but their prices are a little higher.