I installed my very first implant today (NeXT) and it’s already readable on my Galaxy S10+. I did it as a self-install (mostly as a challenge to myself). It was a lot harder to get the needle through my skin than I imagined, but after the needle was fully in I was able to maneuver it underneath my placement marks. I can’t feel or see the chip yet (there’s a tiny bit of swelling) but it’s readable (even under a thick band-aid!) where my placement mark is.
I’m not in a hurry to get anymore but I’ll definitely be getting the Apex Max when it’s released.