I THINK I originally got The Ultron Upgrade Kit - Ultron MAX Kit for $199
I think Ultron kit was a NExT??
An Ultron Max was NExT + original Spark??
( for that same price now, you get NExT + Spark 2 + xLED ), so effectively you are getting the xLED as a freebie, So that is a really good deal
Contents
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NExT dual chip implant
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VivoKey Spark 2 chip implant
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1 xLED-HF LED Implant
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125kHz X Field Detector
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13.56MHz X Field Detector
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RFID Diagnostic Card
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xEM Access Controller
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Dangerous KBR1 Reader
YEP, go for it, you won’t be disappointed
I don’t have one. But from what I have seen
I would say “the usual spot” looks fine.
Also if brightness is what you are after, I would suggest somewhere beneath thin skin, like the top of the hand ( be aware of tendons and blood vessels )
What you also need to think about is, do you want it in its own spot, or alongside another implant ( 5mm gap minimum). Therefore it will light up

I hope that clears things up for you