Quick update on the UP24...
So far so good.
Really though, I'm just starting to get used to having a wristband on. I almost would prefer the type that secures (like a watch, or the Fitbit), but I still prefer the look of the UP. And while I realize that it says you can wear it in the shower (just not submerge it) I do take mine off at those times. I do wear it to bed and set it into sleep mode. It seems to track sleep just as well as my Fitbit Ultra did, just without having to wear a stupid velcro wristband and fit the Ultra into it.
Tonight I'll be trying the "smart alarm" for the first time. It is supposed to detect when you are in a "light" sleep and wake you up near your alarm time (before or after). I usually get up at 6 a.m. - but I tend to cut the timing kind of close - so this means that I'll need to set my smart alarm for a few minutes before that, just in case.
The app is decent enough. I don't think there have been any updates since the recent major update, so it is still fairly rough in some places, I think. Some of the layout and icons appear out of place but I'm no app developer so I couldn't say why. For some reason the app also crashes EVERY MORNING when I take it off my charger. I take it off the charger and try to open the app to see what my sleep was like and it crashes every single time. I can open the app again right away and it seems ok, but still. Annoying.
Also there are the notifications. Whenever the app uploads data to the Jawbone servers, it uses a system notification to show you this. It does these uploads A LOT. So much so that I had to turn off the UP notifications in Pebble Notifier so they didn't kill my watch battery uploading every 10 minutes. This is unfortunate too, because there are occasionally real notifications (that you can customize) to tell you when you get a certain number of steps or something that now I'm not getting on my Pebble. #FirstWorldProblems, I know, but still.
So far I'm pretty happy with it overall I guess. There are the few niggling issues above, as well as fitting it into some clothing. But it does what it is supposed to do, syncs with my phone, and looks pretty good doing it.