…and more importantly, how you’ll handle them. Because if you don’t think you have the resources to deal with potential problems, you should strongly consider whether those risks are worth it.
Although the experience of having magnetic implants is remarkable — you can literally reach out and “feel” power running through cables, engines spinning inside harddrives, power leaks in the surface of electric stoves, and much more, all without physical contact — the experience of having to remove the implants is all too common and extremely unpleasant.
The majority of silicone dipped mangetic implants (which as far as I know are no longer being made) installed so far have ruptured and broken down (which happens within a week of the shell opening), and removal requires a large flap and the excision of some tissue because of how dramatically the magnetic disintegrates — as you can see it’s essentially a powder.
This magnet was installed by Steve Haworth (to be very clear I understood the risks and removal procedure and have no hard feelings toward anyone about how it turned out) and removed from my finger by Tom Brazda. For me the experience, while rather unpleasant at the end, has definitely been worth it.