I have been using a +Fitbit for a while now. In the past few years, using a Fitbit has encouraged me to move more during the day. I have had two of the original Fitbits, and one Fitbit Ultra. I just got a Fitbit One and I was looking forward to the wireless syncing.
Sync we have switch to using Chomebooks as our main computers, it has been pain to sync my previous Fitbits. I would either have to leave a PC or Mac running all of the time, or turn it on often if I wanted my activity data synced. Uploading my data daily is useful when you are trying to compare your activity against your friends. What I ended up doing was turn on a computer when the Fitbit needed to charge. This would sync about a weeks worth of data at once. I was looking forward to the Fitbit One solving this problem, by adding the ability to sync through my cell phone, which I always have with me and is always on.
Unfortunately, wireless syncing doesn't work with my phone, so I still need to turn on a computer at home to sync.
One other downside of the Fitbit One is that they changed the single USB dongle that charged and did the wireless syncing with the Fitbit into two. Now if I want to sync and charge my Fitbit, I need to use two of my USB ports.
I am still pretty happy with the Fitbit One, and am looking forward to being able to sync through my cell phone.