Fitbit Aria
A little expensive but it has been very accurate with my weight and syncs every time with my wifi. I combined this with the fitbit flex and it's great to have a record of weight gain or loss on my computer. I showed this to a friend who just go out of the hospital having  a splint put in his chest and he mentioned that 230 dollars for something like this and the flex is much cheaper than having heart surgery. Of course you have to put in the effort to lose the weight also.
Rating: 5 stars