I bought a FitBit a few years ago exclusively to track my sleep. I also keep it on throughout the day to track my heart rate, in order to establish an accurate baseline for the sleep tracking. Otherwise, I just want to use it throughout the day as a watch.
Here's what's changed in the past few years, just in my very limited sphere of FitBit use:
1. You used to be able to turn exercise detection off. Now you can't. Oh, you can go through and turn off detection of every single enumerated individual exercise, but the master setting "auto-exercise recognition" cannot be switched off. FitBit will still decide to tell you if it thinks you're exercising, even if you're just walking down the block. Want to check the time? Sorry, here's your workout stopwatch instead, and you have to go through a set of steps (scroll, end, done) to end the workout first. And the **ahem** thing just. keeps. buzzing at you.
2. You used to be able to export your sleep data. Now, you have to export all your data at once via Google Takeout, wait a while for that to finish, download the zip file, extract everything, find your sleep data, and delete everything else. Google somehow managed to turn a 2-step, nearly instantaneous process into a 6-step process with a bunch of wait time built in.
Google should stop buying products if it's just going to undermine them in the process of bringing them into lockstep with the Google ecosystem. I am ending my Premium subscription as of today.
Moderator edit: updated subject for clarity
