If it works for payment, it does what it says on the tin.
Now then, since KaiCastledine kind of let the cat out of the bag, be aware that this implant does raise questions. Range may be one thing (that I didn’t know about). Safety may be another.
I suggest you read this, and keep an eye on it. If you have no issues in the future, then great: you got yourself a nice working payment implant. Just be aware that you might.