To be fair i wish they made it easy to change batteries and also the wrist band, it's made of cheap parts but if they say it's not then prove it!! Expensive for no reason and honestly the fit bands from China are good really good and replaceable cheap for £12 yeah boòoiiii...
Good indicator of exercise taken whether it be walking, running or just daily activities. Not sure how accurate it is though, it may take several adjustments to stride etc to get an accurate readout.