The New FitBit (The one that just released less than a month ago)

What do you feel about it? I've heard mostly good reviews but I have heard some bad reviews. It's been a while since I've had a Fitbit. Adam Ruins Everything made me give up on fitness trackers but then I said the hell with him. He basically said that these trackers are inaccurate and it is pointless to use them. However, I've always experienced good weight loss from using them.