Bests & Worsts Reviews from Amazon

I've been using a Fitbit Charge 3 for probably 2 years now, and I love it. When I heard about the Sense, I figured maybe it was time to go big and invest in some of the additional health tracking abilities it could provide. After just a day and a half with the Sense, I went running back to my old Charge 3. I don't know what went wrong at Fitbit HQ on this one, but the Sense is not ready for prime time. It's a prototype being sold as a finished product, and that's false advertising as far as I'm concerned. The first hint that something was amiss was when I tried to figure out how to use the SpO2 sensor. It's not at all what you'd think -- it should just show my SpO2 for me at any given moment, right? Wrong. At the time of the product's launch, you have to get a special watch face for that or it won't even measure SpO2! And to record it for any sort of time-based tracking, you've got to switch watch faces before bed and switch back the next morning (but not TOO soon, or you'll lose all your overnight SpO2 data)! What a truly awful user experience. Trying to figure out where all the fancy new whizz-bang metrics are located both on the watch and in the app (if they're there at all) is a nightmare. Several things aren't even available at launch (and may never be, based on my past experiences with Fitbit products). It's hard to tell if some of this stuff is really going to help or if it's just gimmicky nonsense. It all sounds great when you're first reading about it in the promotional material, but once you're using it, it's a decidedly "meh" experience. There's no standardization -- you can tell different development teams all just smoshed their work together in the app, hoping it would seem cohesive. (Spoiler: it does not.) Fitbit desperately needs new UX designers. They also need to stop trying to corral people into this Fitbit Premium garbage. After purchasing this watch, I shouldn't have to continue paying in order to get my own metrics presented to me cleanly and clearly. Maybe I've misunderstood something here, but if so, that's just more proof that Fitbit isn't communicating its intentions to customers very well because my reading comprehension isn't *that* bad. I just want my raw numbers and some charts, not FitBit's special analysis of it all. Other manufacturers understand this simple concept. Fitbit used to, as well. To top things off, interacting with the watch feels clunky. I guess that's a nitpick in the grand scheme of things, but the watch's UI isn't very responsive... you can tell it's struggling and straining to do the most basic things, like scroll through the list of installed apps or display my stat widgets. This isn't very important to me compared to my other gripes, but it really does add insult to injury. I shouldn't have been disappointed after spending $330 on something like this, but I was. Once I was able to admit that, I started the return process. My next tracker might very well be something like a Garmin Venu Sq.