So, I've been using my Fitbit Charge for four full days as of today. I am unhappy at the difference in steps from my One. I'm having to work a lot harder just to get to my goal of steps each day. Also, my sleep tracking is not doing right either. I contacted Fitbit support today, but I didn't get any useful help. They did give me a case number and I'm to contact them in a few days if it doesn't clear up. I really hope it does. I want to love my new Charge 2. I just want it to track my steps like my One and I'd also like my sleep to be better detected. You can't start sleep mode on the Charge 2, it goes into sleep mode for you. I preferred starting the One to sleep. The Charge 2 keeps saying I'm not going to bed for hours and then I'm up and then I go back to bed! I am hoping that a few more days will get everything back on track.