Works well. Battery lasts just over a week. Was easy to sync with my phone (iPhone) initially. What I like less is that step count is not so accurate (fine for what I need but tends to under-count). Also, does not recognise if I am cycling unless I put it as if I am competing. And often has issues syncing with mobile to save bike route. Finally, not many main screen options (limited colours and presentation) But all in all, very good quality - price ratio.