I'm on my 3rd fitbit device and I am highly disgruntled with how the customer service is just nothing but $#*!ty with their generic responses to customer issues. I bought a Fitbit Charge 4 last year 0n 2nd November and barely two weeks in it gave me lots of trouble with inaccurate readings; I compared this to the readings in my Alta vs thework out videos I used... I've been following up since then and Nov 30th they promised to dispatch a new one after I did all the tests they needed me to do and they found that the device was indeed faulty. I've been following up and allI get is that there is no answer from 'the higher department' on the dispatch... It's been 2 months of a painfulfollow up on email, twitter but still nothing. If you're going to buy their products you better be wary of what to expect or just hope to get really lucky with a good buy! I'd give a zero star only that it's not possible