Regarding the bracelet: * Quality: rather good, produces well-finished and light. * Design: this is not mad but you do not buy it for that reason. * Performance: accurate enough but I do not know any other bracelet for comparison * Battery life: very good, already 2 months and there is still 30% battery after application * Update: I got 2 firmware upgrade in 2 months, so there is support * Works great on iOS
On the application: * Registration in the creation of his profile on the application is tedious, it is redirected to a page in English / Chinese mistranslated that loads very slowly (because the servers probably China). If the application itself does the job: no counter and sleep cycles. * The application is updated regularly and has no bugs on my side: the application can be done in more time.