I decided to purchase the Fitbit Aria WiFi Smart Scale and see if the negative reviews held up ...
I was a bit put-off by some of the Fitbit WiFi scale posted on here - but after wearing a Fitbit Alta-HR for 3 weeks and being particularly impressed by its sleep cycle option, I decided to purchase the Fitbit Aria WiFi Smart Scale and see if the negative reviews held up in my personal experience.  Unlike the wrist band Fitbit Alta-HR, the scale setup is a bit more complicated.  So its probably a good idea to download / PRINT OFF THE USER MANUAL (as the shipping box info in less than minimal).  The Aria Smart Scale requires one knowing their Wifi router's password - as the scale's connection is via the local (residential) WiFi network. The Fitbit Alta-HR arm band uses Blue Tooth to connect to your smart phone; one can then access the phone data via its WiFi access to your computer, if you want to see the phone's Bluetooth data on a larger screen or print it off.  As the Aria scale relies on WiFi to transmit data - I used my computer to setup the scale, once the WiFi connection to / from the computer was established.  This also allows one to easily add up to 8 different user of the scale.  One's weight and BMI are displayed on the scale's LCD window, as well as transmitted to the app and Fitbit computer program.  I personally had no problems with the scale setup and it's integration into the Fitbit phone app as well as the Fitbit computer program.  I don't have any long-term experience with battery life or durability of the scale - so I gave it a 4 star rating.
Rating: 4 stars