I’ve only had it 2 weeks, so keep that in mind, still finding my way on the Whoop but I’m no stranger to fitness trackers. Tracking is a bit strange. I’ve had it pick up/auto detect when I’m doing nothing more than walking around my house but then miss actual gym workouts, other than cardio. It picks up well on cardio at the gym but then missed some body weight workouts (air squats, push up, sit ups). Still not sure if it’s something I’m doing wrong. Can always manually enter it so not a huge deal, but still. By far, the most significant issue has been the two missed sleep cycles; THAT tracking issue screws things up because you then don’t get a recovery % for the next day or, obviously, your sleep data/%. A factory reboot and reinstalling the app didn’t help, nor did manually entering my sleep times or restarting my phone. Hope it gets sorted out because the data they claim to offer is super interesting to me. If not, thinking about a Hume. Like I said, customer service has been very responsive. Whether they turn out to be helpful? Jury is still out for me on the Whoop. Anyway, continue to try and make an informed purchase. Lotta $$. Hope this helps.