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Full Fitbit writeup: The plus side of this product is that the AI Coach is extremely thorough. What do I mean by that? I mean, you can actually feedback it based on what you need. If you're the type of person that doesn't get a ton of sleep every day, you don't want to be constantly reminded of it, you can set different parameters and goals and ask it to treat you differently. It helps navigate around your travel and routine and goals and what you frequently do in a way that is magical. That said, the hardware barely works. As soon as you're out of your routine or switching time zones, the sleep tracking gets weird. It does not auto-recognize or even correctly pull data from activities that aren't just standard running. The updates don't work. Frankly, I just wish that I spent significantly more time testing this product before releasing it, because every time one of those happens, you naturally lose your desire to want to continue tracking. If you compare the AI here to the Whoop Coach, it feels like you're leaving the Dark Ages, and so I hope that they get the rest of the experience up to that level. This is: Are you buying the product versus the marketing for wearables and fitness trackers.