as I wondered in another comment, the button may not always be facing your thumb. so then you'd need to keep fiddling with it anyway.

"Hey google, make a note: ..."

I just tried it, and it worked flawlessly. Now, obviously it's not great for privacy per se, but I'm not jotting down my plans for world domination or anything

Stop using your phone less in front of your kids.

Start using your ring/watch/whatever_else more in front of your kids.

Honestly, it isn't about what you use (that is just hype). You can read the paper all day if you want. I grew up with a father who was listening to radio and watching TV all the time (to be fair: he was disabled, including legally blind). It isn't about using your phone less in front of your kids. It is about being there for your kids when they need you; showing genuine interest in your kids; interacting with them. Right now, as I am writing this to you, my kids are watching Peppa Pig before bedtime. Instead of writing this, I could sit next to them and watch an episode with them.

As for cycling, with a ring you'd have to move your hand towards you or not, but it isn't much different compared to a watch, except perhaps when you'd wear a sweater over your watch.

It is also very typical that in-ear buds are expensive, small, yet hard to repair because the battery isn't user replaceable. And guess what, exactly the same for this device.

Apart from the yet another device with microphone (24/7 on, I suppose) and Bluetooth (the wireless spaghetti protocol) and it not being user serviceable the device costs 100 USD. For such a price, I expect it to last longer than two years. I mean, I'm sick of devices lasting only a few years. I wouldn't need yet another one.

TL;DR hard pass, do better.

I'm sure it won't be able to handle wind noise well (it doesn't look big enough to have multiple microphones) so you'd have to stop the bicycle to make a good recording. Might as well grab the phone then.