Just started using a Fitbit, overall very happy with it. I don't notice it's on which is ideal. There's no display with the Flex 2, and it doesn't give you an account of your heart rate, but that's fine with me. The little lights alert me of a text, a call, or to move, and I can see exactly what I've been doing when I look at my phone. Initially I bought a cheaper version but I had to charge it everyday so I returned it, much prefer the Flex 2.