A.R.
I have an up24. I like it a lot, the app is very easy to use, info but not data overload. It should move on the wrist, not be too snug. I used the size guide on their website, it had me between the small & medium, I got the medium and it's comfortable. Mine did die after 3 weeks, but Best Buy took it back and exchanged it. If this one dies (not uncommon from what i read online) I'll get a fitbit flex or force.