After nearly five years of use, I use my Aria daily and still love it!
I have owned my Aria since April 2013. That is nearly 5 years now. I have changed the batteries twice and it has worked great the entire time. One minor issue is that if I store it on its side instead of flat on the floor, it usually requires a calibration measurement before it is accurate. In other words, I have to weigh myself once knowing that it will read higher than I actually weigh. Then on the second measurement, it is always accurate.  So, I just leave it flat on the floor to avoid that issue. Awesome product! I love seeing my weight history and diet progress on the Fitbit Android app and web site. I also have it automatically sync to my MyFitnessPal.com account.
Rating: 5 stars