Similarly, I grabbed one of the over-the-counter CGM biosensors (Stelo) to gather some data for a couple of weeks and the initial fear of "holy hell, I'm slamming a needle into my arm with something stuck to it" goes away as soon as you slap the injector release.

Just one little clap sound, you feel a little pat on your arm, and the sensor's already made it where it needed to with no pain.

When you remove the sensor it's a little bit of a shock when you see the sensor wire and realize just how small it was and how you never felt it run around inside your arm for a couple weeks.