Bests & Worsts Reviews from Amazon

First off, I will admit I am very concerned that this harvests data for China AI development. Seems cheap for what it does, at sometimes does well. It CONSTANTLY prompts for access to not only location, which I understand, but also my cell phone call logs and history, contact lists, camera functions. Why does this need access to my phone camera and call history? Bought it for fitness (run) tracking, pace vs. heart rate. H/R monitor seems to work very well. The mileage sometimes works okay, and sometimes off by as much as 50%. Will return it if that remains the case.... unusable if not consistent. The sleep monitor is interesting if what it's saying about my sleep patterns is true. Will update if I decide to keep it. And that's another thing... they glue the shipping box together in a way that you need to totally destroy it to get it out of the box. Sheesh! UPDATE: have had this for several weeks now and it's useful for heart rate and one or two other things, but generally useless for running pace and distance functions. More than half the times I use it, the distance and Pace are wildly inaccurate, even though the fitness function on the phone itself, running at the same time, using the same GPS, works fine. See screenshots for an example from recent run. Actual pace showing under 9 minutes/mile on Samsung Fitness tracker, where this one ted device was showing 45 minutes plus for the exact same run.